According to the information community, it is a folk custom for boys to erect flagpoles after the full moon 10, which is mainly popular in Jiangnan area. It means hoping that boys will get ahead when they grow up and become the pillars of the country. Specifically, on the 38th day after the boy is born (28 days after the full moon, 10), a flagpole should be set up in front of the house or in the yard, and a red flag should be inserted on it, and auspicious words such as "Men should strive for self-improvement" and "Dragon and Phoenix are auspicious" should be written. The height of the flagpole should be equal to the height of the house, which means that boys will be promoted and have a successful career in the future. Flagpoles should also be decorated with colored silk, cloth strips and red ropes to increase the festive atmosphere.