If you want to change the valve core, you can change it if you can find the same valve core.
Disassembly method:
First, take down a sign indicating hot and cold water behind the faucet handle.
Second, use a screwdriver to go in from this small hole and loosen the screws inside, and remove the handle.
Third, unscrew the decorative cover and use adjustable wrench to unscrew the fixing screws of the valve core, and the valve core can be removed.
Taobao: Xiao Wu Feiyu is getting hot, I hope.