Guyu originated from the word-making sage Cangjie ancestor, and the main customs include sacrificing to Cangjie, eating spring, and drinking Guyu tea.

1, sacrifice Cangjie

According to the Huainanzi, the Yellow Emperor issued an edict in late spring and early summer announcing the success of Cangjie's character creation, and a rain of grains fell that day. After Cangjie's death, people buried him in his hometown of Baishui County, Shiguan Township, north of the tomb door engraved with a couplet: "rain corn year sense of the emperor, the same text forever with the bridge mausoleum." Every year, the Cangjie Temple Fair is held as scheduled in Baishui County, Shaanxi Province, during the rainy season.

2, eat spring

Before and after the rain, the toon mellow and refreshing high nutritional value, so there is a "rain before the toon tender as silk," said. People picking and eating toon in spring is said to be "eating spring". Toon is generally divided into purple toon buds, green toon buds, especially the best purple toon buds.

3, drink Guyu tea

Fujian tea farmers say, the real Guyu tea is Guyu this day picked fresh tea leaves made of tea, and to be picked in the morning. Guyu tea is bright green in color, with soft leaves and a pleasant aroma.

Guyu weather changes

Guyu's weather is the most important feature of rainy, after the rainfall increased, the humidity in the air gradually increased, conducive to the growth of crops. Into the Grain Rain Festival, in China's middle and lower reaches of the Yangtze River, Jiangnan belt precipitation increased significantly, especially in southern China, once the cold air and warm humid air convergence, often forming a longer period of rainy weather.

The Qinling-Huaihe River basin is basically the demarcation line between the spring rains in Jiangnan and the spring drought in the north, and the spring rains decrease sharply from near the Qinling-Huaihe River to the north. In the north, the rain is the symbol of the "final frost", the cold air invasion of the south is less, but the cold air activity affecting the north did not stop, many places will appear the first thunder.