IP = 104.21.29.72
Content type of robots.txt is text/html; charset=UTF-8!
Look up this url in the url tool
https://qingfengpython.cn/.well-known/acme-challenge: 403 text/html; charset=UTF-8
https://qingfengpython.cn/.well-known/csvm: 403 text/html; charset=UTF-8
https://qingfengpython.cn/.well-known/nostr.json: 403 text/html; charset=UTF-8
https://qingfengpython.cn/.well-known/security.txt: 403 text/html; charset=UTF-8
https://qingfengpython.cn/.well-known/traffic-advice: 403 text/html; charset=UTF-8