While there probably is an element of that, hard evidence that might paint the Chinese government negatively in general is much more difficult to obtain because of information and communications controls.
From the database author himself [0]:
> "we have over 10000+ documented people" was the initial comment. Neither boasting nor saying 100% are credible.
I honestly find it both hilarious and disappointing that HN users are skeptical and contrarian about absolutely everything, except when it comes to what the US government and its proxies have to say about China.
[0] https://twitter.com/shahitbiz/status/1306554296088096769?s=2...
[1] https://twitter.com/DanielDumbrill/status/130801041951298764...