You can not be with him physically right now and he is returning to china so I would not worry. If you trust him then there should not be a problem. See what happens when he gets back if it is not working out then move on. Do not waste time on those who do not care about you!
a dream is only a dream because you have not made it reality yet
Actually i think that u re getting to feel angry, and u, of course, hv right to feel angry.. If the case u re talking about is true, he just gives 1 email to u per 1 week, and 10days around, even no any news from him, nobody, at least I, do not believe that he is still being your bf, obviously he does not care about u, at this moment.. Thinking it is the time to think about your relationship..