== 需求文档 ==
http://rdtrac.pc.com.cn/mobile/pototype/pcauto-prototype/PCauto5.7.6-v1.0-news/#g=1&p=%E8%AF%B4%E6%98%8E%E5%8F%8A%E6%9B%B4%E6%96%B0%E8%AE%B0%E5%BD%95