The word "bamboo slips" originated in the pre-Qin period. The ancients wrote on bamboo slips, but the bamboo slips were greasy on the surface, which was not easy to be carved and easily eaten by insects. So we came up with a way to burn bamboo slips on the fire first. This process is called "bamboo slips" or "historical records".

Later, people wrote on the bamboo green with a brush, which saved the process of carving with a knife, so when fixing the paper, they just need to cut off the bamboo green and write it on the bamboo white. This process is also called "fixing green".

The word "killing green" was first seen in Liu Xiang's "Narration of Warring States Policy" in the Han Dynasty: "After the Spring and Autumn Period, everything was killed since the beginning of Chu and Han Dynasties." There are two theories about killing Green. One is "killing green bamboo slips", that is, "historical records", such as the biography of Wu You in the later Han Dynasty: "Hui (the father of Wu You) wants to kill green bamboo slips to write a book." Li Xian commented: "It's also sweat simplification to make you sweat with fire, and it's also sweat simplification to take the green book and not smoke." First, I think that "fixing green" refers to "finalizing the book", because in ancient times, the word "killing green" meant cutting and cutting. The first draft was drafted on green bamboo, and the bamboo was peeled off when it was finalized. The book was written on bamboo white, and the handwriting was eaten on bamboo, which was difficult to change. Therefore, later generations used "Xiuqing" to refer to "the book is finalized", such as Lu You in the Song Dynasty.

As we all know, enzyme fixation is the first process of green tea processing. The picked tender leaves are heated at high temperature to inhibit fermentation, so that the tea leaves keep their inherent green color, and at the same time, the moisture in the leaves is reduced, making the leaves soft and convenient for further processing.