Zhang Zhen
Dong Yuyu
https://rsf.org/en/china-prominent-journalist-dong-yuyu-sentenced-prison-bogus-espionage-charges
And more than a hundred others
https://cpj.org/reports/2008/06/12iii-2/
Julian assange hand nothing to do with revealing the US killing journalists. Yeah, the current US government suppresses free press, it that is not even a fraction of what China does. It is absolutely absurd to call them a reliable source