Ear seed, also known as "busy seed", is the ninth solar term in the twenty-four solar terms, the third solar term in summer and the beginning of the afternoon month in the dry calendar. The yellow meridian of the sun reaches 75 degrees, which is celebrated on June 5-7 of the Gregorian calendar every year. Mang seed means "food crops with awns can be planted". This season, the temperature rises obviously, the rainfall is abundant and the air humidity is high, which is suitable for planting cereal crops such as late rice. Agricultural planting is bounded by the solar term "awn seed", and the survival rate of planting has become lower and lower since then. It is the reflection of ancient farming culture in festivals.