References cited in the text of the paper should be marked with Arabic numerals 1.2 in square brackets. Wait a minute. Appears in turn in the form of a mark in the upper right corner. When citing multiple documents, the serial numbers of individual references should be listed in square brackets, and each serial number is indicated by ",". If it is a continuous serial number, you can mark the serial number. The citation order of references, that is, the following coding order, should not be disordered.