I got a very good deal from Andy it was 1hr for RMB 2600(Andy is the manager of the wind tunnel), and I stayed in Mianzhou kaiyuan hotel which is very near to the Mianyang science and technolgy museum and you can even walk from the hotel to the wind tunnel, I hope it work for you too, me only 67 jumps and while Iwas not jumping here in China I did it to keep myself trainning and get some skills in bellyfly(turns-sideslide, up, down, so on) I tried backfly but it was difficult to learned in only one time, so Im planning to hit the wind tunnel again shortly
best regards