China smartphone shipments declined -14% YoY in Q3 2018. The decline is the combined result of lengthening replacement cycle, economic headwinds, and ongoing industry consolidation in China. Huawei, OPPO, vivo, and Xiaomi remained as the big four smartphone vendors. Huawei has benefited most from the on-going industry consolidation. OPPO and vivo have stabilized their performance, eyeing to the new segments. Xiaomi’s outlook in China started to be cloudy. For smaller Chinese vendors, it is increasingly difficult to survive in this hyper competitive market and they are more vulnerable to economic headwinds. Our extensive report contains handset and smartphone shipments and market share by multiple vendors and operating systems by quarter in China from Q1 2009 to Q3 2018. A forecast by smartphone vendor for Q4 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.