A coast guard patrol ship is seen sailing through sea ice in Liaodong Bay, northeast China, on January 18, 2017. / Xinhua Photo: Pan Yulong

According to North China Sea Marine Forecasting Center of State Oceanic Administration, that has sent out coast guard patrol ship to inspect sea ice regime in northeast China’s Liaodong Bay, the sea ice area has risen to 6,098 square kilometers, which covers 19.93 percent of the Liaodong Bay area. / Xinhua Photo: Pan Yulong

According to Li Ke, North China Sea Marine Forecasting Center's chief forecaster, global warming in recent years has lightened the ice regime in Liaodong Bay, and ice regime this year is particularly lighter than before. / Xinhua Photo: Pan Yulong

The inspection will continue for 10 days, which will provide instructive information on local sea activity. / Xinhua Photo: Pan Yulong

A worker of North China Sea Marine Forecasting Center of State Oceanic Administration takes water sample from Liaodong Bay in northeast China, Jan. 18, 2017. / Xinhua Photo: Pan Yulong