When you post an Advertisement, you can set the transaction limits. You can make transactions only with eligible buyers/sellers. The limits you can set include:
The buyers/sellers must have completed at least x transactions; (How to set: enter "x", the number you need to set)
The buyers/sellers must have completed advanced verification; (How to set: check the box)
The buyers/sellers must have bound their phones (How to set: check the box).
Notes: the "x" refers to the total transactions of the buyers/sellers rather than 30-day transactions.