Here are two vids in Mandarin (English subtitles) from two whistleblowers from mainland China: Lude, and Guo Wengui (Miles Guo). I am posting these without comment; they speak for themselves.

1. Lude vid

2. Guo Wengui (video only) here:

https://s3.amazonaws.com/gnews-media-offload/wp-content/uploads/2020/10/18065244/Miles_20200927_part1-revised.mp4

2. Guo Wengui's vid and webpage text:

We Will Not Allow the CCP’s Pro-Democracy Phonies to Represent Chinese Overseas