It is a law of interpersonal communication, also called the law of sanqi. It is believed that a healthy interpersonal relationship should be seven points positive and three points critical.
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Law is a universal and mandatory principle, which describes a law or rule in observed natural or man-made phenomena. Law can be applied in different fields, including physics, chemistry, biology, social science and so on. In physics, there are many famous laws, such as Newton's law of universal gravitation and the second law.
The law of universal gravitation points out that there is gravitation between any two objects with mass, and the magnitude of this gravitation is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between them. Newton's second law expresses the relationship between the acceleration of an object and the acting force, that is, F equals ma, where F represents the acting force, M represents the mass of the object, and A represents the acceleration of the object.
There are also many laws in chemistry, such as the law of conservation of mass and the law of conservation of energy. The law of conservation of mass points out that in chemical reactions, the total mass of reactants is equal to the total mass of products. The law of conservation of energy shows that energy can't exist from scratch or disappear, but can only be transformed from one form to another.
The laws in biology include Mendel's law of heredity and Darwin's law of natural selection. Mendel's genetic law describes the genetic law of organisms, indicating that the inheritance and variation of genes follow certain laws. The law of natural selection means that in nature, organisms that adapt to the environment will survive and reproduce more easily.
In social sciences, there are also some laws, such as Moore's Law and Say's Law. Moore's Law states that the performance of computer hardware will double every 18 months. Say's law expresses the principle that supply creates demand, that is, when a producer provides a new product or service, it will create demand for the product or service.
In a word, "law" is a principle that describes laws or rules in natural or man-made phenomena. In different fields, there are many different laws, all of which have their specific scope of application and conditions. Through the understanding and application of these laws, we can better explain and predict natural and social phenomena.