It's "urban residents' medical insurance", and you can get reimbursed no matter where you are in China. In Wenchang, it's like
50%, and in Haikou, it's like 38%.
You just tell the doctor you want to be reimbursed and he'll get it for you.
Extended reading: insurance how to buy, which is good, hand to teach you to avoid the insurance of these "pits"