One possible version ：
I'm very glad to have received the letter you sent me last week. I have been thinking about the question you asked me. From my point of view, you can choose to come to China after finishing your studies.
For one reason，China's development over the past 30 years offers quantities of job opportunities for the young, What's more，what you are studying is badly needed in China nowadays. In fact, many big companies in our city are hoping to hire people like you.
For another reason, China is a country with so different cultures and traditions from the west that many foreigners enjoy living and working here. Why not come and join them? I'm sure you will adapt to the environment quickly. If you come here，I will do what I can to help you. So what are you waiting for?
I'm looking forward to your coming.