First, the quality of content is too low, and there are a lot of such content on the Internet, which leads to insufficient inclusion in search engines.

Second, your website blocked the content link you sent and prohibited Baidu from including it, so it was not included.

Third, your website crawling frequency did not engage in or create sitemap and other methods to promote Baidu crawling, which led to Baidu not being included in time, rather than not being included.

Fourth, there is malicious cheating in your website, which leads to the search engine punishing your website, not including any content and clearing all data.

Fifth, your space is unstable, which makes Baidu search engine unable to crawl your website content normally, which makes Baidu unable to include it.

Sixth, you mistakenly blocked Baidu's IP, resulting in being excluded.

Seventh, your website or content has no external link, which leads to Baidu not knowing his existence, so it cannot be included.