There is a custom in Jiaodong called crossing the sea when you meet a hurdle. People often go out to sea by boat and pray for happiness and good luck. The custom of crossing the sea originated from the myth of the Eight Immortals. However, in some places, the 40th birthday will not be celebrated tomorrow. There is a saying that if you don't learn from the teacher, something will happen. Therefore, you can't have a birthday party on your 40th birthday, but you have to travel across the ocean. It means going out to play by boat God bless.