Photo taken on Nov 24, 2015 shows the snow scenery of Pingyao Ancient City, North China’s Shanxi province. Founded in the 14th century, the Ancient City of Pingyao is an exceptionally well-preserved example of a traditional Han Chinese city, which was named a World Heritage Site by UNESCO in 1997.[Photo/Xinhua]

Snow and frost cover a face of a soldier during a training in Beiji village of Mohe city, China’s northernmost village in Northeast China’s Heilongjiang province, Nov 23, 2015. Soldiers here still stick to daily training even though the temperature here is freezing cold.[Photo/Xinhua]

Photo taken on Nov 25, 2015 shows the mist-shrouded Lushan Mountain scenic resort in Jiujiang, Jiangxi province. [Photo/Xinhua]

Students play table tennis in snow at a middle school in Wushe county, Central China’s Henan province, Nov 24, 2015. [Photo/Xinhua]

Tourists visit the crescent spring of the Mingsha Hill in Dunhuang, Northwest China’s Gansu province, Nov 24, 2015. [Photo/Xinhua]

Photo taken on Nov 25, 2015 shows an aerial view of the Quancheng Park in Jinan city, East China’s Shandong province. [Photo/Xinhua]

Two black swans and three little swans are seen swimming in lake in the “Old Summer Palace”, also known as “Yuanmingyuan”, in Beijing, Nov 22, 2015.[Photo/Xinhua]

Footprints are seen on a snow-covered road at a park in Jinan, capital of East China’s Shandong province, Nov 25, 2015. [Photo/Xinhua]

Workers clear snow on the railway in Houma city, North China’s Shanxi province, Nov 24, 2015. [Photo/Xinhua]

Leaves are frozen in water after a snowfall in Jinan, capital of East China’s Shandong province, Nov 25, 2015. [Photo/Xinhua]

Tourists visit the Tiantan Park in Beijing, Nov 22, 2015. [Photo/Xinhua]

Photo taken on Nov 23, 2015 shows the scenery of Huangyaguan section of the Great Wall after a snowfall in Tianjin, North China. [Photo/Xinhua]

Photo taken on Nov 26, 2015 shows patterns formed by frost on a window in Yiyuan county, East China’s Shandong province. [Photo/Xinhua]