Source on Communist Party entrance process: https://daily.jstor.org/communist-party-of-china/
Source on Communist Party entrance process: https://daily.jstor.org/communist-party-of-china/
Just because a single or few instances of a particular information attribute is public, it's quite different compared to majority of instances being available at the same time - that this made it to front page of HN shows it's at least interesting news to many.
I have never received a mainland Chinese resume overseas, so would not know about the overseas question.
Edit: The parent originally asked "even when working in foreign companies? even when working in foreign countries?"
Not really. I have a friend who nearly joined in college. They had several rounds of applications: the first few went to kids with connections (or whose connections put them in a good position, e.g. appointed to be some kind of student government thing). Once those groups were exhausted, other kids got a chance. My friend was a very good student, but got a no-so-subtle message from the school official running the process that they wouldn't be considered without a bribe.
Based on my experience in China, this sounds 100% correct.