There is no need to reschedule. I don't think there is anyone who is not present for personal reasons. It has nothing to do with you. Just like getting married, some people wrap red envelopes when they don't come. Do you want to invite them later? As for the return, it depends on the customs of your hometown. If not, you don't have to return it. We all came with the local conditions and customs of our hometown. Because we are colleagues, we don't want anything. Or see how your former colleagues operate. Just follow. Generally, some people here don't accept full moon wine red envelopes, but they do. It depends on how you want to pull it.