A tour is twelve years. Twelve-year-old is a custom agreed by the people in China, so the tenth anniversary is 12 years. Ten days is ten days. When expressing age, ten years is regarded as ten years. Generally speaking, ten years older can also refer to 12 years. Generally speaking, ten years older or ten years younger refers to a zodiac cycle 12 years. In ancient China, the heavenly stems and the auspicious days were repeated every ten days, so a ten-day word was specially used to express this concept.

The meaning of time to people

Time is an abstract concept, and it is a manifestation of the continuity and sequence of material movement and change. The concept of time includes two concepts: moment and time period. Time is a parameter used by human beings to describe the process of material movement or the occurrence of events. The determination of time depends on the law of material cycle change that is not affected by the outside world.

For example, the cycle of the moon around the earth, the cycle of the earth around the sun, the cycle of the earth's rotation, and the cycle of atomic oscillation. Einstein said that time and space are an illusion of people's cognition. Time is an objective existence. The concept of time is the result of human understanding, induction and description of nature.

Time is a manifestation of material existence, and time has absolute significance. Because of the permanence of material existence and the regularity of movement and change, time passes evenly without beginning or end.

People abstract the concept of time from material existence, and can use it as a measure of the length of material existence. The unit and length of time are artificially specified, and it is a physical parameter that people must introduce in order to study the existence and movement of matter.