China smartphone shipments declined -16% YoY in Q4 2017, due to the extended replacement cycle, accelerated consolidation among smartphone OEMs, inventory correction, as well as economic headwinds. Huawei solidified the leading position in Chinese smartphone market this quarter, followed closely by OPPO and vivo. Apple posted a strong quarter in China mainly thanks to the healthy demand of iPhone X during holiday season. Our extensive report contains handset and smartphone shipments and marketshare by multiple vendors and operating systems by quarter in China from Q1 2009 to Q4 2017. A forecast by smartphone vendor for Q1 2018 is also included. The report is a valuable tool for stakeholders wishing to track the China market, the world's largest by volume and revenue.