1, knotting notes
Whether knotting with one rope or crossing with multiple ropes, in the final analysis, it is just a way to express and record numbers or other directions.
Some simple concepts. Like memorabilia, little things. The number of acne also represents the number of things. It can only help people remember certain things, but it can't exchange ideas. Therefore, it is impossible to produce words, but it can only be said that it is the gestation stage before the words are produced.
2. Take notes
People use lettering to mark numbers with certain lines and engrave them on wood chips or bamboo chips as a contract between the two parties. Later, people separated the deed from the middle and divided it into two halves, each holding half. Take the coincidence of the two as evidence. The figures engraved on the ancient deed are mainly suitable for making debt certificates.