Hello, the first operation of cup-shaped ear plastic surgery buried 50 ~ 80 ml water bag (skin and soft tissue expander) in the mastoid area of residual ear, and the hospitalization time was about 4 days. Seven days after operation, normal saline was injected every other day, and it took about 1 month to fill it with 50 ~ 80 ml normal saline. After the water injection, he rested for 1 month, and then came to the hospital for a second operation.