Do U wanna be my penpal？
Um I come from China and I enjoy the feeling of paper letter, so I want to find pen friends around the world, I like to write postcards, but do not know is there anyone willing to be friends with me and write letter to each other?

Question

Answer

Writing letters is a nice thing to do. I hope you find some penpals and that you enjoy writing to them.

Just one piece of advice, especially as you are so keen on writing:

'U' is not an English word. Nor is 'wanna'. Your title should be this:

'Do you want to be my penpal?'