How did Netease know that the change was successful?

Netease's successful number change will remind you that as long as it is successful, you will receive a successful message on the new number. Due to the limitation of Netease platform, it is generally 24 hours. For example, the Netease mobile phone account with automatic delivery will enter a 24-hour "security review period" after submitting the mobile phone to be replaced; After the approval, it will be changed to the buyer's mobile phone number and enter the "transaction protection period" state. In other words, it takes a 24-hour review period and a 36-hour protection period to automatically confirm the receipt and transfer the money to the seller.