Domain Block Recovery: Distinguish DNS Pollution, ISP Blocking, and WeChat/QQ Interception, and Restore Without Changing Domain

When your business domain is inaccessible in some provinces or shows a blocked page in WeChat/QQ, frequently changing domains leads to user loss and broken promotion links. This article covers troubleshooting methods for DNS pollution, regional ISP hijacking, and social platform blocking, and explains how to achieve recovery without changing domains through DNS pollution cleaning, block recovery, and seamless 301 redirects.