When I traveled to Japan, I issued a balance certificate for my visa. It seems that I have to freeze 5W for three months. I came back from Japan at the beginning of the month.

It can be thawed in advance. You need to go to the counter with the deposit certificate issued by the bank at that time. It is recommended to apply for a visa next time. If the intermediary asks for a deposit certificate, it only needs to freeze the bank until the date of returning to China, instead of three months, which saves trouble. Moreover, almost no country's embassy requires a deposit certificate, which is required by the institution to reduce the risk of detention.