Letter (Pinyin: xìn, shēn). It is a general standard first-level character in Chinese. It was first seen in bronze inscriptions, so there is no way of writing it in oracle bone inscriptions. The original meaning is truthfulness in speech, and its extension generally refers to honesty and non-deception. It also extends to credit, which leads to the meaning of certainty and reliability. It can also refer to news and information.
During the Warring States Period, the word "信" was widely used in names of people and monarchs, and was also engraved in seals as auspicious words. The original meaning is to be truthful in words, and its extension generally refers to honesty and not cheating. It also extends to trustworthiness, which means being able to fulfill your promises without leaving the other party doubtless. The common writing methods in ancient Chinese fonts are as follows:
Extended information:
The word "xin" was a word used very frequently during the Warring States Period. There were great regional differences, and each of the Six Kingdoms scripts had its own characteristics. . The glyph "18" of the Chu State comes from the word "thousands of sounds"; the glyph "19" of the Three Jin and Yan states comes from the word "body"; the original character of the Qi State is "Repent" (which is not the same character as the small seal script "Repent" in "Shuowen"), and later becomes "?".
"Xin" is originally a pictophonetic character, which comes from the sound of "Qian" or the sound of "Shen". The Qin characters come from the sound of "人" or "人", which may contain the expectation of honesty in people's words.
Baidu Encyclopedia - Letter