The origin and customs of Grain Rain and the origin and customs of Grain Rain.

1. In late spring and early summer, the emperor announced the success of Cangjie's word-making to the world and ordered everyone to learn this word. At this time, the wonders of Grain Rain appeared, so this day became Grain Rain and was included in the 24 solar terms.

2. In Grain Rain, people also worship Cang Xie and eat Toona sinensis.

3. Grain Rain is a solar term closely related to Cang Xie. After Cang Xie's death, people buried Cang Xie in his hometown and worshipped him in Grain Rain every year to commemorate his achievements in ci creation. Now, Cang Xie's hometown, Baishui County, Shaanxi Province, still holds the Cangjie Temple Fair in Grain Rain every year.