What does "202 1" mean?

It was completed on 202 1, that is to say, a play, a movie or a TV series was shot on 202 1.

The word "killing green" comes from the Han Dynasty? Liu Xiang's "Preface to the Warring States Policy": "After the Spring and Autumn Period, from the beginning of Chu and Han Dynasties, the matter of 245 years has been exhausted." "Definite" means that something is almost finished, which means "definite".

There are generally two expressions for "fixing green".

1, indicating the completion of articles, books and work.

The previous writing work has begun to enter the later stage of finalization or production. We know that "history" refers to the ancient people writing on bamboo slips. First, the bamboo is roasted with fire to remove water, and then the green skin of the bamboo is scraped off, which is convenient for writing and moth-proofing. People call this process "killing green".

Because the ancients wrote a book, the draft should be written on the skin of bamboo, which is smooth. If you want to modify it, it is easy to erase the original handwriting. So after shaping, people scrape off the green skin of bamboo to expose the bamboo white, and write the words on the bamboo white, so that it is not easy to wear them off. Here, the process of peeling, scraping and drying green husk with fire is called "deactivating enzymes".

So later people used to call the final version of a book "fixed", and later it generally referred to the completion of a book or the shooting of a film and television work, which was also called fixed.

2. Immobilization is the first production process of green tea, yellow tea, black tea, oolong tea, Pu 'er tea and some black tea.

People heat the fresh leaves, which makes the tea soft, easy to knead and shape, and promotes the formation of tea fragrance.

Therefore, in the production of green tea, there are fried green tea, steamed green tea and so on. Although the production methods are different, they are all dried by rolling. Among them, the enzyme fixation process is particularly important, which is the key process in green tea processing and plays a decisive role in the quality of green tea.