Fishermen check the net on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

A fisherman shows the newly-caught fish on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

Fishermen check the net on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

A fisherman pulls net on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

Shao Jiangze, head of local fishermen, prays during a ceremony to launch the winter fishing on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

Fishermen work on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

Two newly-caught fishes are shown on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

Newly-caught fishes are show on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

A fisherman breaks the ice on the Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)

Fishermen prepare to cast nets on the ice-covered Songhua River in Zhaodong City, northeast China's Heilongjiang Province, Jan. 7, 2014. The winter fishing started in chilly weather with 30 degrees Celsius below zero. (Xinhua/Wang Kai)