Vehicles which were detained by a heavy fog wait to leave a port in Haikou, capital of south China's Hainan Province, late Feb. 15, 2013. A total of 46,000 passengers and 8,700 vehicles have left the Port of Haikou from 8:00 p.m. Friday to 8:00 a.m. Saturday, after being detained by a heavy fog that disrupted the waterway traffic across the Qiongzhou Strait. (Photo/ Xinhua)