ffguboyao Before answering your question, I'd like to mention that this forum has a translation button. Please feel free to post in your native language. We can translate your posts using the button, so there's no need for you to do it yourself.
We apologize for the difficulty in finding older posts on our blog. In fact, I believe we've discussed improving this, but it was put on the back burner. We will reconsider this matter based on the feedback we've received.
Regarding Spinebot's response, the blog does not actually have a search box. You can search for blog posts by using a search engine like Google with the query “site:esotericsoftware.com/blog/”.
