learning a new language well is not easy.

I have been learning english many year, now I can read very well, but not speaking and listening.

Maybe there is a lack of environment where I can keep listening and using my english.

If you are in China and wants to learn chinease. That will be so easy. You have the environment.

AND I can be helpful in your chinease-learning.

The best way to learn a foreign language is reading and listening on a comprehensible level. Speaking you can do when there is a need to speak. Start with childrens books or short stories. Chinese has of course the additional difficulty of characters, so you need reading material with not too many different characters. For that the "Chinese Breeze" books are very good. They have short stories with only 300 different characters. That is a number also an absolute beginner can manage in a short time! Plus a MP3 CD.

Language exchange is useless. J & W's English is poor, why? because they have no interest in the language beyond just the learning. Their now level should be good enough to read books they are interested in because of real interest and not because of need-to-study-more-more-more.

You have an interest? Then just do that, but in the target language.... Forget about learning and specially any boring learning books.

writing and reading is easy. stay here post, get the sh*t taken out of you sometimes, but then you get a western culture lesson for free, too.

in a more serious way, reading, well books or magazines about stuff that interests you are always a good thing. if those are to hard, go for kids tales or stuff the like.
writing, well, it will improve a bit slower than your reading, but it will improve by reading a lot, too. writing essays and handing them to somebody who is a native speaker or at least really good works, too. another method is copying passages out of books.