How to disassemble and install the faucet?

After opening the screw will be able to fall down smoothly，single cold water faucet in caravan not working，single cold water faucet beside shower，single cold water faucet from kitchen，you can see a copper size nut, single cold water faucet in caravan not working，single cold water faucet beside shower，single cold water faucet from kitchen，and then use a large wrench to remove this nut, after the faucet will be able to smoothly take off the valve spool to。