Passengers drive their cars onto the ferry at Xiuying port in Haikou, capital of south China's Hainan Province, Feb. 22, 2018. Ferry services resumed Thursday on the Qiongzhou Strait, a major gateway to China's southernmost island province of Hainan, but time will be needed to clear the backlog of stranded vehicles. A prolonged heavy fog disrupted ferry services on the Qiongzhou Strait earlier. (Xinhua/Yang Guanyu)