Sleeping means the arrival of the hottest period of the year, and people often hope to convey a blessing through diet and other means, hoping to spend this rainy day safely.

People tend to lose appetite in summer, and jiaozi is just an appetizer in traditional customs.

There is also a saying that jiaozi is shaped like an ingot. It's Kim, Kim Po-chang. Jiaozi on the head is a "treasure of Yuan", symbolizing full blessings.