Photo taken on Feb. 9, 2014 shows the sea ice on the beach of Beidaihe in Qinhuangdao City, north China's Hebei province. Temperature of this area dropped to minus 14 degree Celsius on Sunday. (Xinhua/Yang Shiyao)

Photo taken on Feb. 9, 2014 shows the sea ice on the beach of Beidaihe in Qinhuangdao City, north China's Hebei province. Temperature of this area dropped to minus 14 degree Celsius on Sunday. (Xinhua/Yang Shiyao)

Photo taken on Feb. 9, 2014 shows the sea ice on the beach of Beidaihe in Qinhuangdao City, north China's Hebei province. Temperature of this area dropped to minus 14 degree Celsius on Sunday. (Xinhua/Yang Shiyao)

Photo taken on Feb. 9, 2014 shows the sea ice on the beach of Beidaihe in Qinhuangdao City, north China's Hebei province. Temperature of this area dropped to minus 14 degree Celsius on Sunday. (Xinhua/Yang Shiyao)

Photo taken on Feb. 9, 2014 shows the sea ice on the beach of Beidaihe in Qinhuangdao City, north China's Hebei province. Temperature of this area dropped to minus 14 degree Celsius on Sunday. (Xinhua/Yang Shiyao)

Photo taken on Feb. 9, 2014 shows the sea ice on the beach of Beidaihe in Qinhuangdao City, north China's Hebei province. Temperature of this area dropped to minus 14 degree Celsius on Sunday. (Xinhua/Yang Shiyao)