How to start from scratch with an empty number

This kind of number takes a lot of effort. It is recommended to re-play a number and upgrade it diligently. As for the empty number, it can be sold in the Treasure Pavilion. Many trumpet upgrades that need to be empty now are also very rewarding. Or you can keep your number for the time being. After the trumpet is used, the large size will naturally be rich. Pure hand play is welcome to adopt #21.