At your age, you can make external incision bags under your eyes. I'm not from Beijing, but I estimate it will cost at least 3000 yuan. There is no need to trim double eyelids. If you want to tell the doctor that you want to have a repair operation, you should pay more money and make a cut double eyelid.
Generally, eye surgery takes 5 days to remove stitches, and the recovery time varies from person to person, which is similar to that of your previous surgery.
As for which hospital is good, it's hard to say. Even if you can't find a good doctor in a famous hospital, it's useless. Let's see which of your friends is doing well, and then go to see the doctor.
Don't watch advertisements to see the curative effect.