I want to replicate last year's contract gift box collection activity for this year's Christmas/Spring Festival. The reward amount is suggested to be set lower than Christmas but higher than Spring Festival, and two suggestions for last year's activity should be added: 1. The collection of the contract gift box can be set to a limited time of 5 minutes/15 minutes, just like receiving a red envelope, as there is a timing for opening positions; 2. The contracts created after receiving the contract gift box are isolated positions, and cannot be closed within a certain time limit, which is determined by the sender of the contract gift box.