A foreign tourist (front) gains first-hand experience in ice fishing at Nuogan Lake on the Hulun Buir Grasslands in north China's Inner Mongolia Autonomous Region, Dec. 18, 2019. Ice fishing activity has become a major tourist attraction at Nuogan Lake during winter time when the lake is fully clad in ice and snow. (Xinhua/Liu Lei)

A worker selects the "champion fish" of the catch during the ice fishing activities at Nuogan Lake on the Hulun Buir Grasslands in north China's Inner Mongolia Autonomous Region, Dec. 18, 2019. Ice fishing activity has become a major tourist attraction at Nuogan Lake during winter time when the lake is fully clad in ice and snow. (Xinhua/Liu Lei)

Ice fishers sling their catch ashore at Nuogan Lake on the Hulun Buir Grasslands in north China's Inner Mongolia Autonomous Region, Dec. 18, 2019. Ice fishing activity has become a major tourist attraction at Nuogan Lake during winter time when the lake is fully clad in ice and snow. (Xinhua/Liu Lei)

Ice fishers sling their catch ashore at Nuogan Lake on the Hulun Buir Grasslands in north China's Inner Mongolia Autonomous Region, Dec. 18, 2019. Ice fishing activity has become a major tourist attraction at Nuogan Lake during winter time when the lake is fully clad in ice and snow. (Xinhua/Liu Lei)