Vehicles wait for ferry service on the road to Xinhaigang 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)