I am learning English because I wanna want to study abroad in someday, maybe in the U.S. or one of the european countries. I wanna  want to make friends with anybody whose native language is English. Aha, my native language is Chinese and I grew up in mainland of China.
I enjoy reading books ,listenning to music and playing table tennis. In my spare time I'd like to play computer games with net my online friends. I (am a master now) have a master's degree(?) and majoring in the field of materials. Nice to meet you guys. Those who wanna learn about Chinese culture,I would like to communicate with you.

1. wanna - very casual word, it's okay to say it like this in conversation, but when writing something, it's not appropriate.

2. Always start sentences with a capital.

3. Although "In my spare time I'd like to play computer games..." is correct, I didn't think it was what you meant. I'd = I would. In this case it would mean you haven't played computer games before, but would like to in the future.