Excuse me, what's the name of China people? Where can I buy it? how much is it?

I forgot the name, but I know that some medical devices in Medical Insurance City cost 50-ranging from 80 yuan to 20 yuan, but I don't recommend buying them, because they are leaked after being used twice. If you go to those places where medical devices are sold, there must be some for sale. . . I've been thinking about the specific name for a long time, but I really forget what it seems to be. .