You better search for native English speakers on 'language partners' to help you improve your English, preferably ones learning Chinese for mutual exchange.
Here are some tips to help improve your English on the long run:
*Reading at your level of comprehension simple texts or books and looking up new words .
* Listening to English through music and possibly reading the lyrics.
* Watching movies in English with subtitles in your mother tongue..
* Chatting with natives online using voice chats or in real life .Mingling with natives is a very good way to be constantly listening to speech in English, even if you don't understand at the beginning.