Why did Mr. Bai behave himself from a poet of social activism to the one of idyll?  A graceful self host articulated her comments in following video.

https://www.ixigua.com/7158829347720626725?logTag=e99c30c0e483eb7ce5ad 

FYI, I had happened to translate subject two poems:

https://classic-blog.udn.com/kkuo0810/132333008 (賣炭翁)

https://classic-blog.udn.com/kkuo0810/132302971  (大林寺桃花)