Photo taken on Sept. 10, 2017 shows a tray of sliced salt preserved eggs at Foshoushan Food Co., Ltd. in Guang'an, southwest China's Sichuan Province, Sept. 10, 2017. Salt preserved eggs, a kind of traditional food of Guang'an City, is made of duck eggs boiled and steamed with dozens of condiments. Guang'an City has made the traditional food as a scaled industry by encouraging food companies to diversify their products and promoting sale on the internet. (Xinhua/Wang Quanchao)