Manzhong: also known as "busy seed", it is the ninth solar term of the twenty-four solar terms, the third solar term in summer, and the beginning of the noon month in the calendar of stems and branches.

Manzhong is the ninth solar term among the twenty-four solar terms, the third solar term in summer, and the beginning of the noon month in the calendar of stems and branches. Douzhisi, the sun's yellow longitude reaches 75°, and the festival takes place on June 5-7 of the Gregorian calendar every year. The meaning of "awnzhong" is "cereal crops with awns can be planted, otherwise they will become useless". During this season, temperatures rise significantly, rainfall is abundant, and air humidity is high, making it suitable for planting late rice and other cereal crops. Farming is bounded by the solar term "awnzhong", after which the survival rate of planting becomes lower and lower.

It is the reflection of the ancient farming culture on the festivals. The solar term of Ear Grain is of great significance in farming. The Lunar Almanac says: "The Dou Zhong is already a field of awns. At this time, you can plant a valley with awns. If it exceeds this point, it will be ineffective, so it is called awns." This means that the awns solar term is suitable for planting cereal crops with awns; it is also the time to plant crops. The dividing point, beyond which it becomes invalid.

This is what the folk proverb "If you don't sow the awns, it will be useless to sow them again". Mangzhong is a solar term that is busy in farming, and it is also called "busy planting" among the people. This season is when rice is planted in the south and wheat is harvested in the north. Mang Zhong, "Mang" refers to some crops with awns, such as rice, millet, millet, etc.; and "Zhong" refers to the "kind" of seeds and the "kind" of sowing.