While I personally don't think Julian Assange did anything ethically or morally wrong, and the US government's dogged pursuit of him was unjust, he did leak military intel which is much more serious and legally significant than what people often get jailed and harassed for in China. Like, I would not expect to leak info about the military in any country and just walk away as if nothing happened.

People have literally been jailed for making Tweets in China, people have been punished as retaliation against someone in their family being a dissident, we really shouldn't be comparing the two countries as if they're the same, regardless of the numerous major issues the US has. And even if they were the same, it doesn't make anything China does even slightly more justifiable.