A guard boat is on duty on the sea covered by drift ice, in Qinhuangdao, north China's Hebei Province, Jan. 8, 2013. A cold snap has created a layer of thick sea ice in the offshore areas of the Bohai Bay in Hebei Province. (Photo/Xinhua) 
Local coastal police officers are on duty on the sea covered by drift ice, in Qinhuangdao, north China's Hebei Province, Jan. 8, 2013. A cold snap has created a layer of thick sea ice in the offshore areas of the Bohai Bay in Hebei Province.(Photo/Xinhua)
Local coastal police officers are on duty on the sea covered by drift ice, in Qinhuangdao, north China's Hebei Province, Jan. 8, 2013. A cold snap has created a layer of thick sea ice in the offshore areas of the Bohai Bay in Hebei Province. (Photo/Xinhua)
A vessel sails on the sea covered by drift ice, in Qinhuangdao, north China's Hebei Province, Jan. 8, 2013. A cold snap has created a layer of thick sea ice in the offshore areas of the Bohai Bay in Hebei Province. (Photo/Xinhua)
Local coastal police officers are on duty on the sea covered by drift ice, in Qinhuangdao, north China's Hebei Province, Jan. 8, 2013. A cold snap has created a layer of thick sea ice in the offshore areas of the Bohai Bay in Hebei Province. (Photo/Xinhua)