Rainwater solar terms are an introduction to several nine rainwater solar terms.

1, the rain solar term is the sixth day of July 9th.

2. Seven or nine days is from the fifty-fifth day to the sixty-third day of the winter solstice of the lunar calendar. The number nine songs say that "the river opens in July and September", which means that by July and September, the frozen river surface began to thaw and resume circulation, so at this time, the weather gradually warmed up, the river ice became civilized, and geese flew in.

Rain is the first solar term named after precipitation among the 24 solar terms. By the solar term, the number and amount of rainfall have increased significantly, and the solar term means that it has entered the spring with meteorological significance.