Qi, since the oracle bone script, has meant "knife engraved".
A contract is actually the process of both parties reaching a certain mutually recognized agreement, and regulating it.
It actually consists of two parts, namely first reaching a "verbal agreement", an "agreement between both parties", and then using tangible objects to fix the process.
Contract books and the like are actually the written form of "agreements", and the process of turning agreements into "written records".....Contracts, legal documents, and even official documents can be considered a kind of contract in some sense.
That is, I "recognize" your official control and order, and obey the "agreements" you have established for the sake of social civilization.
Just as the Social Contract Theory in the West becomes the cornerstone of Western civilization, Eastern society is also built on mutual trust and contracts.
