Hong Kong, Macao and Taiwan license plates are allowed to enter Shanghai, and Hong Kong, Macao and Taiwan license plates can often be seen. But Shanghai, Hong Kong, Macao and Taiwan usually have two license plates, that is, Hong Kong, Macao and Taiwan license plates and Shanghai license plates.

Pay attention to see each other clearly when choosing a license plate. The so-called meeting of yin and yang means that the number of the license plate should be even and even, not all even and even, because the Book of Changes thinks that solitary yin is not born and solitary yang is not long. Three talents are well deserved. The so-called "three talents matching" is to deal with the relationship between heaven, earth and people. People who live between heaven and earth must respect heaven and earth. If there are three numbers, the middle number can't all be greater than the numbers before and after; If it is four digits, the middle digits should not be all greater than the numbers before and after; If there are five numbers, the middle number should not be greater than the numbers on both sides.