Chat often. Chat to natives. Also there are a great many Chinese people on italki, QQ & QTalk & likely other platforms, who speak excellent English.
Listen, podcasts, news. Read, yes, but I suspect if you want to become natural, you should practice thinking in English till it just becomes natural.
Sorry, not a fast answer.
Maybe also think about your motivation. If you want to work in a call centre, where you should sound like someone just down the road form the caller, ok, sounding absolutely natural is a good concept.
Otherwise, though, if understanding is your aim, as in casual conversation, having an accent & a few Chinglish phrases is part of global English.
Personally, I find the American tendency to use adjective as adverbs strange. Some Chinglish expressions are no more strange to me.
Practice. Be encouraged. You are obviously already very close.