We call it "round lock" when we celebrate 12' s birthday. Round lock is a local "adult ceremony" ceremony! A custom that appears in Hebei, Henan, Shanxi, Shandong, Shaanxi and other five northern provinces and parts of Inner Mongolia Autonomous Region. Local children will throw a big party when they are over twelve. Among them, this ceremony has been modernized in Erdos, Inner Mongolia. At present, some film and television cultural institutions in Tiexi, Dongsheng District have witnessed a collective wheel lock ceremony.

According to the local saying, once a child is born, his soul will be incomplete during his minor period, and he will be added one point every year, and the zodiac lock made of flour will be locked until he is twelve years old. At this time, there will be an unlocking ceremony (also called round lock). In the north of China, the birthday of child 12 is commonly known as "round lock", which is a blessing for children to enter youth. Also known as "unlocking", "ecstasy lock" and "round sheep", it is a birthday ceremony specially held for children over 12 years old. This custom is very common.