说明：  华维编程规范：源文件头部应进行注释，列出：版权说明、版本号、生成日期、作者、模块目的/功能、主要函数及其功能、修改日志等。
(Wei-Yi Hua programming norms : source document should head for the Notes listing : copyright statement, the version, production date, author, Module purpose/function, and its main function function, change log.)