PDU发送中文短信时，GB2312转换成UCS－2的程序，为最底层的内码轮换，压缩包内包括：官网下载的GB2312.txt源文件、GB2UCS2.c源文件（有注释）和GB2UCS2.h头文件。-PDU when sending text messages in Chinese, GB2312 converted into UCS-2 program, for the most yards in the bottom of the rotation, compression package inc