Comment by dear

Yes, I didn't make those things up. They are not all from a single source though. I don't keep a list of everything I have read but here is one (in chinese):

https://zh.wikipedia.org/zh-tw/%E6%9D%8E%E9%94%90_(1917%E5%B...

https://www.voachinese.com/a/voanews-20180413-former-secreta...