# BeaverCheck Audit Report — https://12371.cn

**Date:** April 22, 2026  
**URL:** https://12371.cn  
**Overall Grade:** D (63/100)  
**Report:** https://beavercheck.com/results/6e7c0d47-efd5-40c4-9163-91771a49e381

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** HSTS header is missing — Security > Security Headers
3. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
4. **[CRITICAL]** Soft 404: server returns HTTP 200 for non-existent pages — Accessibility > 404 Error Page
5. **[WARNING]** 113 third-party resources (100% of weight) — Performance > Page Weight Inventory

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 56 |
| Accessibility | 82 |
| Best Practices | 81 |
| SEO | 83 |

---

## Security

### Security Headers (F — 10/100)

*2 of 10 headers properly configured*

- **[CRITICAL]** HSTS header is missing — Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 1 year.
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[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 header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
- **[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 present without version info

### 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 196 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)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## 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*

- **[PASS]** security.txt is present — good practice
- **[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 — 7/100)

*3.7 MB transferred, 114 requests*

- **[WARNING]** Page weighs 4.1 MB (3.7 MB transferred)
- **[WARNING]** Images are 3.5 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[WARNING]** 114 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 0.77 g CO2 per page load

### Third-Party Impact (D — 50/100)

*100% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 100% of page weight (3.7 MiB of 3.7 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)

*98 images, 0 KB saveable*

- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p3.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p3.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p3.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p3.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/templet/comm... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p1.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p5.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p4.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p2.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://p3.img.cctvpic.com/photoAlbum/page/perform... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (C — 60/100)

*1881ms total JS execution*

- **[WARNING]** https://www.12371.cn/: 849ms CPU time
- **[WARNING]** Unattributable: 693ms CPU time
- **[INFO]** https://p5.img.cctvpic.com/photoAlbum/templet/comm...: 181ms CPU time
- **[INFO]** https://www.12371.cn/js/swiper.min.js: 158ms CPU time
- **[WARNING]** Third-party scripts: 1881ms (100% of total)

### Font Loading (A+ — 100/100)

*No web fonts (system fonts)*

- **[PASS]** No web fonts loaded — system fonts are fastest

### JS Bundles (A+ — 100/100)

*9 scripts, 29 KB unused*

- **[WARNING]** https://r.img.cctvpic.com/photoAlbum/templet/js/jq...: 29 KB unused (78%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 29 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 (D — 45/100)

*114 resources · 3.7 MB · 29 KB savings available*

- **[WARNING]** Page weight 2.7 MB over 1MB target
- **[WARNING]** 113 third-party resources (100% of weight)
- **[INFO]** 1 resources over 200KB

---

## Infrastructure

### DNS Records (B — 70/100)

*1 A records, 598 ms lookup*

- **[PASS]** Resolves to 1 IPv4 address(es)
- **[INFO]** Single A record — no DNS redundancy — Multiple A records provide failover if one server goes down.
- **[INFO]** No IPv6 (AAAA) records
- **[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]** 2 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 (598 ms) — Slow DNS adds latency to every page load. Consider a faster DNS provider.

### Redirect Chain (B — 70/100)

*1 redirect(s), 1745 ms total*

- **[PASS]** Single redirect
- **[INFO]** WWW normalization redirect
- **[WARNING]** Redirect overhead: 1745 ms total

### IPv6 Readiness (C — 60/100)

*No IPv6 support*

- **[INFO]** No IPv6 (AAAA) records found — IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

### Crawlability (A+ — 95/100)

*robots.txt present, sitemap with 2 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 2 entries
- **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

### URL Variants (D — 50/100)

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

- **[CRITICAL]** Both www and non-www versions serve content
- **[CRITICAL]** HTTP version does not redirect to HTTPS

### Domain Intelligence (A — 90/100)

*12371.cn — via 北京国旭网络科技有限公司, 23 years, 5 months old, hosted on ASEAN-INTERNATIONAL-INFORMATION-GARDEN-IDC China Telecom, CN*

- **[WARNING]** Domain expires in 39 days — Consider enabling auto-renewal to prevent accidental expiration.
- **[PASS]** Registrar: 北京国旭网络科技有限公司
- **[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: ASEAN-INTERNATIONAL-INFORMATION-GARDEN-IDC China Telecom, 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
- **[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

---

## 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 (F — 30/100)

*No cache headers*

- **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

### 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]** Missing Strict-Transport-Security header — HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks.
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## UX

### 404 Error Page (F — 20/100)

*Soft 404 detected*

- **[CRITICAL]** Soft 404: server returns HTTP 200 for non-existent pages — The server returns HTTP 200 for a path that does not exist. Search engines will index these pages, diluting your real content. Configure your server to return a proper 404 status code for missing pages.

### Favicon & Branding (F — 15/100)

*1 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[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'>.

### Web Manifest (F — 30/100)

*Invalid JSON*

- **[WARNING]** Manifest contains invalid JSON — Manifest at https://12371.cn/manifest.json contains invalid JSON. Browsers cannot parse it.

### 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)

*1.04g CO2 per view*

- **[WARNING]** 1.04g CO2 per page view — This page transfers 3.7 MB, producing an estimated 1.04g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.19g, network 0.18g, end-user device 0.67g.
- **[INFO]** At 10,000 monthly views: 125.1 kg CO2/year — With 10,000 page views per month, this page would generate approximately 125.1 kg of CO2 annually — equivalent to charging 15642 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 32 KB (vs 3770 KB first visit). 113 of 114 resources are served from browser cache, saving 1.03g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.01g CO2 (first visit: 1.04g)

### Carbon Budget (D — 50/100)

*62th percentile*

- **[WARNING]** 1.04g CO2 — above the median website (0.60g) — Heavier than an estimated 38% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 62th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

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

*99% efficient*

- **[PASS]** Transfer efficiency: 99% — Only 28 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/6e7c0d47-efd5-40c4-9163-91771a49e381*