Hello，friend, or 

Hi everyon. Nice to meet you!This is Yulia from China，I want to make friends with foreigners , so that I can improve my English's skills and later, travel around the world. Do you mind adding me on Facebok:Yulia Zhu（朱艺欢）and chat with me?

Hello，, [1] friends

Hi, everyoneNice to meet you!  This is I am Yulia from China.   I want to make friends with foreigners and the so that I can improve my English skills and travel around the world.  Could Would you mind adding me on Facebok (Yulia Zhu 朱艺欢) and chat with me?

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[1] If you can, use real English punctuation rather than Chinese punctuation characters.

[2] Add a space (' ') after every comma (',') and full stop ('.').