他們隻是在微信聊天，沒有郵件和電子郵件的來往，更沒有合照。我朋友的兒子需要準備哪些材料證明，那個女生需要準備哪些材料證明？謝謝老師！
-The boy needs to write a letter of invitation to the girl to invite her to visit him. If the boy will pay the travel costs, then he needs to provide the completed I-134 with the support documents. The girl may provide teh copy of their communication records.
Just try and youi never know. If fail, the boy may visit China to meet the girl face to face, then the girl can try it gain later.
