Around May 1st, there was indeed a significant change in the performance of Duhu Valley on Google. Websites that used to perform well on Google, such as Duhu Valley's Long March, can now not be found even after searching through the first five pages. Almost all websites on the internet have opened up blog registration functions. As long as you register a blog and then疯狂ly publish a large number of articles with your own links, the number of links can be easily resolved.