I think it is a great honor to be invited to be the best man or maid of honor. After all, you are not the protagonist. During the wedding, you are trying to help the groom complete the wedding more smoothly and handle the messy things around the couple. Do a good job in planning/arranging/working all the details of the wedding on that day, such as picking up and dropping off the wedding car/shooting/seating the guests, etc., all of which are considerate. Smiling often, humorous words and manners can easily mobilize the atmosphere and slow down the mood of newcomers. When picking up the bride, the best man should take the lead in tackling the problem. Help the groom give up drinking, drink well, control his own rhythm (say more words to persuade him to drink), don't get drunk, you will lose face, and then you will have your job. In the second half, where are the good brothers and sisters of the men and women?