2. Salt is a first-class Chinese character (commonly used word) in Chinese. This word first appeared in the bronze inscriptions of the Warring States period, and its original meaning refers to salt. The chemical composition of salt is sodium chloride. After the introduction of chemical science into China, the compound composed of metal ions or ammonium ions and acid ions or nonmetal ions was named "salt". Can also be used as a surname. When you read Yan, you mean salting.

3. Notes on explaining words: Lu Ye. Born brine, life salt. The word "salty" is written in each cross, which is correct today. Salt tastes salty, but salt is not trained as salty. The three quotations from Xuanying Book and Shuowen are naturally called halogen, and life is called salt, which should be here. If you put the word "halogen" on it, you will be prepared for those who are muddy and analytical. "Zhou Li", the salt man, the decree of taking charge of salt, there are those who use salt directly without treating it, and those who treat it with it.