# BeaverCheck Audit Report — https://beijing.gov.cn

**Date:** April 22, 2026  
**URL:** https://beijing.gov.cn  
**Overall Grade:** D (66/100)  
**Report:** https://beavercheck.com/results/e7de0f15-1bca-482d-bdd4-9280b656b093

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
3. **[CRITICAL]** No favicon or icon links detected — Accessibility > Favicon & Branding
4. **[WARNING]** 143 HTTP requests — consider bundling or reducing — Performance > Page Weight Budget
5. **[WARNING]** Cross-Origin-Embedder-Policy header is missing — Security > Security Headers

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 61 |
| Accessibility | 70 |
| Best Practices | 96 |
| SEO | 83 |

---

## Security

### Security Headers (F — 25/100)

*3 of 10 headers properly configured*

- **[WARNING]** HSTS header has no valid max-age — The max-age directive is required and must be a positive integer.
- **[PASS]** X-Content-Type-Options is properly configured
- **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN.
- **[WARNING]** Referrer-Policy has a weak value
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is not present

### Content Security Policy (F — 0/100)

*No enforcing CSP policy found*

- **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

### TLS & Certificates (A+ — 100/100)

*TLS 1.3, 7 checks passed*

- **[PASS]** TLS 1.3 is used
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 176 days)
- **[PASS]** Certificate chain has 3 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 2 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*2 cookies analyzed, 6 checks passed*

- **[PASS]** Cookie 'lcid' has the Secure flag
- **[PASS]** Cookie 'lcid' has the HttpOnly flag
- **[PASS]** Cookie 'lcid' has SameSite=Lax
- **[PASS]** Cookie '__jsluid_s' has the Secure flag
- **[PASS]** Cookie '__jsluid_s' has the HttpOnly flag
- **[PASS]** Cookie '__jsluid_s' has SameSite=None

---

## Advanced Security

### Subresource Integrity (A+ — 100/100)

*No external resources*

- **[PASS]** No external resources to protect

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[INFO]** No security.txt found — Consider adding a security.txt at /.well-known/security.txt.
- **[PASS]** No sensitive files exposed

### Email Security (F — 30/100)

*No DMARC*

- **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures.

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (F — 26/100)

*3.0 MB transferred, 143 requests*

- **[WARNING]** Page weighs 3.6 MB (3.0 MB transferred)
- **[WARNING]** Images are 2.5 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[WARNING]** 143 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 0.64 g CO2 per page load

### Third-Party Impact (A+ — 100/100)

*6% third-party, 0 ms blocking*

- **[INFO]** Third-party code accounts for 6% of page weight (186.7 KiB of 3.0 MiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (C — 60/100)

*107 images, 0 KB saveable*

- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202602/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/toutiao/202604/W... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202004/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/index_icon_zzc_2... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202510/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202603/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202409/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202507/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/index_icon_bs_20... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202603/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202604/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202501/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202402/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202602/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/index_imgsld_mob... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202602/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/logo_ch_20191009... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202004/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202004/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/index_icon_xwfbh... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/ico_dzjg_ch_2019... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202004/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202603/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202204/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202209/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/common_gotop_202... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/common_more_2025... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202312/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202012/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202603/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/index_icon_znwd_... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/images/index_icon_zhd_2... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202603/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202603/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/sylbt/202603/W02... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202602/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.beijing.gov.cn/shouye/syfwtj/202004/W0... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (D — 40/100)

*2291ms total JS execution*

- **[WARNING]** https://www.beijing.gov.cn/: 894ms CPU time
- **[WARNING]** Unattributable: 745ms CPU time
- **[INFO]** https://wza.beijing.gov.cn/dist/aria.js?appid=3648...: 186ms CPU time
- **[INFO]** https://www.beijing.gov.cn/images/jquery.js: 173ms CPU time
- **[INFO]** https://www.beijing.gov.cn/images/public_foot_resp...: 161ms CPU time
- **[INFO]** Third-party scripts: 1012ms (44% of total)

### Font Loading (A+ — 100/100)

*2 fonts (170 KB)*

- **[INFO]** 2 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (B — 80/100)

*17 scripts, 117 KB unused*

- **[WARNING]** https://wza.beijing.gov.cn/dist/aria.js?appid=3648...: 95 KB unused (70%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.beijing.gov.cn/images/jquery.js: 21 KB unused (69%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 117 KB

### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*No optimization needed*

- **[PASS]** No resource hint issues

### Page Weight Inventory (C — 60/100)

*143 resources · 3.0 MB · 117 KB savings available*

- **[WARNING]** Page weight 2.0 MB over 1MB target
- **[INFO]** ~117 KB of savings available
- **[INFO]** 15 third-party resources (6% of weight)
- **[INFO]** 1 resources over 200KB

---

## Infrastructure

### DNS Records (B — 75/100)

*2 A records, 309 ms lookup*

- **[PASS]** Resolves to 2 IPv4 address(es)
- **[PASS]** Has 2 IPv6 (AAAA) record(s)
- **[WARNING]** CNAME record at zone apex — A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
- **[PASS]** 6 nameserver(s) configured
- **[INFO]** No MX records — email not configured via DNS
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[INFO]** No SPF record found in TXT records — SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
- **[WARNING]** DNS resolution is slow (309 ms) — Slow DNS adds latency to every page load. Consider a faster DNS provider.

### Redirect Chain (A+ — 100/100)

*No redirects — direct access*

- **[PASS]** No redirects — direct access

### IPv6 Readiness (A+ — 100/100)

*IPv6 reachable (170 ms)*

- **[PASS]** IPv6 is configured and reachable at 2409:8c04:1101:3050::406, 240e:95c:806:40::422

### Crawlability (A+ — 100/100)

*robots.txt present, sitemap with 125 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 125 entries
- **[PASS]** robots.txt references sitemap

### URL Variants (B — 75/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[CRITICAL]** HTTP version does not redirect to HTTPS

### Domain Intelligence (A — 90/100)

*beijing.gov.cn — via 北京首信网创网络信息服务有限责任公司, 28 years, 3 months old, hosted on CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN*

- **[WARNING]** Domain expires in 47 days — Consider enabling auto-renewal to prevent accidental expiration.
- **[PASS]** Registrar: 北京首信网创网络信息服务有限责任公司
- **[WARNING]** Registrar lock is NOT enabled — The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
- **[PASS]** Hosting: CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (B — 80/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[INFO]** No terms of service link detected
- **[INFO]** No cookie consent banner detected
- **[PASS]** 2 cookie(s) set on initial load (functional)
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (F — 30/100)

*No viewport meta tag*

- **[CRITICAL]** No viewport meta tag found — Without a viewport meta tag, the page will not render correctly on mobile devices.

### Third-Party Trackers (A+ — 100/100)

*No third-party trackers detected*

- **[PASS]** No third-party trackers detected

### Cookie & Tracker Inventory (A+ — 100/100)

*2 cookies · 0 trackers · 0 pre-consent*

- **[INFO]** 2 cookie(s) could not be classified

---

## Availability

### CDN & Delivery (D — 50/100)

*No CDN detected*

- **[WARNING]** No CDN detected — A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

### HTTP Caching (A — 90/100)

*max-age=60 (1 minute)*

- **[PASS]** Cache-Control header is set
- **[PASS]** Effective TTL: 1 minute (max-age=60)
- **[INFO]** No ETag or Last-Modified header — Conditional requests (304 Not Modified) are not possible without validators.

### Transport Security (B — 75/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
- **[WARNING]** HSTS max-age is short: 0 days — HSTS max-age should be at least 1 year (31536000 seconds).
- **[INFO]** HSTS missing includeSubDomains — Without includeSubDomains, HSTS only protects the exact domain.
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## UX

### 404 Error Page (F — 0/100)

*HTTP 403, bare page*

- **[WARNING]** Unexpected status code: HTTP 403 — Expected HTTP 404 but received 403. This may confuse search engine crawlers.
- **[WARNING]** Bare server default 404 page — The 404 page has no custom styling. Users hitting a broken link see a generic error with no way to navigate back. Add a custom 404 page with your site navigation and a search bar.

### Favicon & Branding (F — 0/100)

*No icons detected*

- **[WARNING]** No favicon.ico at site root — Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.
- **[INFO]** No apple-touch-icon detected — iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.
- **[CRITICAL]** No favicon or icon links detected — Your site will show the browser's generic page icon in tabs, bookmarks, and home screens.

### Web Manifest (D — 40/100)

*Not found*

- **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

### Dark Mode Support (D — 40/100)

*No dark mode signals*

- **[INFO]** No dark mode signals detected — Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 0/100)

*No navigation patterns*

- **[INFO]** No breadcrumbs, search, or skip link detected — These navigation aids help users orient themselves and find content efficiently, especially on large sites.

---

## Sustainability

### CO2 Per Page Load (D — 50/100)

*0.86g CO2 per view*

- **[INFO]** 0.86g CO2 per page view — This page transfers 3.0 MB, producing an estimated 0.86g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.16g, network 0.15g, end-user device 0.55g.
- **[INFO]** At 10,000 monthly views: 103.2 kg CO2/year — With 10,000 page views per month, this page would generate approximately 103.2 kg of CO2 annually — equivalent to charging 12895 smartphones.

### Green Hosting (D — 50/100)

*Unknown*

- **[INFO]** Hosting provider could not be identified — Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (A+ — 100/100)

*99% cached*

- **[PASS]** 99% reduction on repeat visits — Returning visitors download only 43 KB (vs 3108 KB first visit). 142 of 143 resources are served from browser cache, saving 0.85g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.01g CO2 (first visit: 0.86g)

### Carbon Budget (D — 50/100)

*57th percentile*

- **[WARNING]** 0.86g CO2 — above the median website (0.60g) — Heavier than an estimated 43% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 57th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (A+ — 100/100)

*96% efficient*

- **[PASS]** Transfer efficiency: 96% — Only 116 KB of potential savings identified. Your page is well-optimized for size.

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/e7de0f15-1bca-482d-bdd4-9280b656b093*