In pics: sea ice in Qinhuangdao (5)

Policemen from the frontier police station patrol along the coast covered by sea ice in Beidaihe of Qinhuangdao, north China's Hebei Province, Jan. 23, 2016. Sea ice along Bohai Sea and northern Huanghai Sea continued to expand due to a strong cold front. The North China Sea Marine Forecasting Center of State Oceanic Administration has been issuing a blue alert for sea ice in Liaodong Gulf for three consecutive days since Jan. 21. (Xinhua/Yang Shiyao)