1. A computer-implemented character conversion method, comprising: acquiring at least one character encoded in a first character set, wherein the first character set conforms to Unicode Worldwide Character Standard and each character is encoded in first character codes according to the first character set; converting the first character codes of each character to numeric character references, wherein the numeric character references conform to Hypertext Markup Language; and storing the numeric character references of each character to a computer-readable medium using a second character set for encoding.