chinasigma.cn

小学数学 · 水池问题动画

Built with

No platform, CMS or framework detected. Detection is passive: it only sees what a site exposes in its HTML, headers and cookies, so custom or well-hidden stacks show up as nothing rather than as a guess.

Also detected

Infrastructure

Nginx

Overview

Status

alive

Registered

unknown (this domain's registry doesn't publish it via RDAP)

First seen here

2026-09-22

Hosting

Alibaba (US) Technology Co., Ltd. · AS45102 · Hong Kong SAR China

Server header

nginx/1.24.0

Response time

737 ms to first byte, measured from our crawler

TLS certificate

Let's Encrypt · TLSv1.3 · expires 2026-12-21

Language

zh-cn

Mobile-ready

yes (viewport meta tag)

Linked to from

0 other sites seen so far

Generated automatically from passive, publicly observable data. Think something here is wrong or want this profile removed? See /bot. Machine-readable: JSON.