Origin for each line in single_doc/网址.md from check-in 9a86f2df19:

9a86f2df19 2024-07-01    1: # 网址
9a86f2df19 2024-07-01    2: 
9a86f2df19 2024-07-01    3: > https://www.bilibili.com/video/BV1r7411374d