Things are so small.

As for this, small enough means that the seeds of summer crops are full, but immature, just small enough, not full enough.

From the twenty-four solar terms of Wucheng in Yuan Dynasty: in mid-April, people are full when they are small, and things are full when they are small. A small harvest means that summer grain is in the filling stage when the grain is not full, the ears of wheat in the farmland are gradually enriched, a gust of wind blows, and the green wheat waves fluctuate, which brings people the expectation of a bumper harvest.

During the Xiao Man solar term,

Generally, there will be more and more rainfall in South China. Warm and humid air from the ocean is active and meets cold air from north to south. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain; Jiangnan area, are often rivers and lakes. If there is little rain at this stage, it may be that the Pacific subtropical high is weak and located in the south, which means that it is Huangmei season.