Japan's industrial standard, JISK 0101, defines a car as a vehicle equipped with an engine and a control device that can still drive on land without a fixed orbit or overhead line. The value contains human consciousness and the double development of life, including the unity of human and external nature. All the development of the self - world is of value. The core essence of value is the free man, and the man who creates himself is the free man. Man is the ultimate object of value, man is the value ontology, man's behavior is the source of value, and the development of man is the result of value. The development of human beings is the unity of human's inner contradictions and external contradictions. It is the overall development of human consciousness and human life and the whole development of human and nature. That is, the self-creation of man and the unity of external creation and creation of nature, and the creation of this freedom is also the value behavior, so the whole value is the realization of freedom Money sent home by migrants constitutes the second largest financial inflow to many people developing countries, exceeding international aid. Estimates of remittances to developing countries differ from International Fund for Agricultural Development's. Remittances contribute to economic growth also to the livelihoods of folks worldwide. The value contains human consciousness and the double development of life, including the unity of human and external nature. All the development of the self - world is of value. The core essence of value is the free man, and the man who creates himself is the free man. Man is the ultimate object of value, man is the value ontology, man's behavior is the source of value, and the development of man is the result of value. The development of human beings is the unity of human's inner contradictions and external contradictions. It is the overall development of human consciousness and human life and the whole development of human and nature. That is, the self-creation of man and the unity of external creation and creation of nature, and the creation of this freedom is also the value behavior, so the whole value is the realization of freedom In the face of market failure, coase has given the opposite answer: external-utility problems can be solved by explicitly using the market, without government intervention. And zhang wuchang is more absolute, he said that there is no so-called external utility, there is only unclear property rights. Anyway, coase brought revolutionary innovation to market concepts. He made it clear that the key to the market was not the "price mechanism" of impersonal machinery, but the power of participants in economic activity. The importance of gasoline was not recognized in the 19th century, when it was used in a great deal of kerosene. The oil refining then relied on simple distillation processes to separate the different components of the oil from the boiling point. The boiling point of the kerosene component is higher, and the use of safety when lighting lamps becomes the main product of crude oil refining, while gasoline and other components are often burned as fuel. By the mid - to late 19th century, the successful use of gasoline engines in 1886, in 1886, the gasoline engine was successfully used as a driving force, thus the importance of gasoline increased. But using distillation, only 20% of the gasoline can be extracted from crude oil. In 1911, the standard oil company have solved the problem of low gasoline yield, by William burton and Robert hamm forest thermal cracking process of the invention, the heavy quality heating gas oil cracking of light gasoline fractions, such as to overall improve the gasoline yield, thermal cracking process in 1913 won the patent license in the United States. The subsequent catalytic cracking process has further improved the gasoline yield and octane value.