File photo taken on Oct. 16, 2015 shows a light show on the "Iron" Pagoda in Kaifeng, central China's Henan Province. The pagoda was built in 1049 A.D. and get its name for its iron brown color. Pagodas built in ancient times in Henan act not only as landmarks for sight-seeing, but also as observers of the Chinese history. (Xinhua/Li An)