Dear all,
Thank you for replying me. Just wanna update my situation. The prof. talked to me yesterday and told me that he is going to offer me a RA position. Then, I received official email today . It was really tough to go through the endless waiting.
I did send 2 emails to show that I am strongly interested. However, I can't tell whether it makes any difference. Personally, I think someone has rejected the offer and I am lucky enough to pick up the slot. For the person who gave up this offer, thank you for being considerate.
Best wishes to all who are waiting.
tuckie