vivo、OPPO、步步高，这三家公司到底是什么关系？
[https://mbd.baidu.com/newspage/data/landingshare?context=%7B%22nid%22%3A%22news_9426489372481101416%22%2C%22sourceFrom%22%3A%22bjh%22%7D&isBdboxFrom=1&pageType=1&rs=3282746843&ruk=5YVLPscR2T9cfVkltYleXA ]