What powers cjoe.ac.cn?
Last seen Oct 2026 · 7 technologies across 7 categories
Font scripts
JavaScript frameworks
Prototype
since Jan 2023
JavaScript graphics
JavaScript libraries
Programming languages
Java
since Jan 2023
UI frameworks
Web servers
Nginx
since Jan 2023
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 100% desktop
United States
China
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.89 / 10 · ranked #655,314 of all domains
35 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.3 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Weight: 0.1 MB · 11 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Systems Engineering-Theory & Practice
- Founded: 1981
From Wikidata (CC0).
Infrastructure
- DNS: xincache.com
- Email: no MX record returned
- SSL: Xin Net Technology Corp., RSA 2048, wildcard, expires Apr 2027
- Common Crawl link graph: rank 6,731,713, 9 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.cjoe.ac.cn | 7 |
| cjoe.cjoe.ac.cn | 6 |
| syssci.cjoe.ac.cn | 6 |
| chinamath.cjoe.ac.cn | 4 |
| actamath.cjoe.ac.cn | 2 |
| applmath.cjoe.ac.cn | 2 |
| computmath.cjoe.ac.cn | 2 |
| sysmath.cjoe.ac.cn | 2 |