How to speaking good English ?

First, your question should be: How to speak good English?

But it doesn't matter if you make some mistakes when you speak English, as long as what you say can make sense to others.

Practice makes perfect. You should often use oral English. When you do not need to translate Chinese into English any more, you have reached a level of good communication. Then, only by then, you should pay attention to grammar and appropriate usage of words.

May you succeed!

I'm glad that you like to speak English, I'm Canadian so I'll give you some advice and I sincerely hope that you will improve on speaking.
First, to speak English correctly, you should make sure that you know how to use the words, in another saying, you should know your grammar.
Second, you should be brave. Be brave when you speak to other people, just as the saying goes "practice makes perfect" . Also it's a good idea to speak to foreigners, don