1, if the younger brother gets married first, the younger brother will press the elder brother in fortune, and the elder brother will face many hardships and setbacks.
2. It will have a serious impact on future generations. On the wedding day, the bride's dress can't have pockets, otherwise it will take away her family's wealth; There should be no aunts and sisters-in-law at the bride's farewell party, because the homonym of loneliness and sweeping the floor has a bad meaning for the couple. This answer is for reference only. Don't be blindly superstitious.