A flag-raising ceremony is held in front of the Sept 18 Museum in Shenyang, capital of Liaoning province, on Sunday, Sept 18, 2011. More than 1,000 people attended the event that marked the 80th anniversary of Japan's invasion of China and the start of a 14-year occupation up to the end of World War II. [Photo/Xinhua]

Yaks graze in a snow-covered field on Qilian mountain in Tianzhu county, Southwest China's Gansu province, Sept 18, 2011. A flow of cold air hit western Gansu on Saturday night, bringing heavy snowfall to the Qilian mountain area. [Photo/Xinhua]