What does the maximum expansion of the US Mission mean by 20?

It means that the inflated red envelope with the highest denomination that users can receive can be inflated to 20 yuan. Specifically, users can receive red envelopes with different denominations when they participate in activities, and the denomination of red envelopes can be expanded to a higher amount when users place orders. This inflated amount will not exceed that of 20 yuan, that is, 20 yuan can be reduced or exempted at most. In addition, the use of inflatable red envelopes will be subject to some restrictions, for example, it can only be used in some shops and not in other shops.