What country are you from, and are you a male or female? How many 5 minute performances are you supposed to do between 8-11pm?
If you do this every night, five days a week, you’ll be making 20k a month, which is pretty great money in Chengdu, especially for 3 hours a day. However, it is lower than the average amount that dancers make per performance. I’d say the average price for a foreign dancer (lets say, American or Canadian) would be 1,000 – 1,500rmb for one or two performances of about 10 minutes each.
Then again, the catch with those types of gigs is that they’re irregular, so a dancer of that type will have a difficult time making 20k unless they have tours booked solid. Between 2007-2010 or so it was common to see dancers and DJ’s in that situation but it’s very rare now, especially in this region of China.
Hope this helps!