Photo taken on Aug 27, 2016 shows the Xixing bridge across the Qiantang river in Hangzhou city, capital of East China's Zhejiang province. The 11th G20 summit will be held from Sept 4 to 5 in Hangzhou. [Photo/Xinhua]

　　Tourists walk on the Yongjin bridge across the West Lake in Hangzhou, capital of East China's Zhejiang province, May 2, 2015. The 11th G20 summit will be held from Sept 4 to 5 in Hangzhou. [Photo/Xinhua]

　　Tourists walk on the Xiling bridge across the West Lake in Hangzhou, capital of East China's Zhejiang province, Aug 26, 2016. The 11th G20 summit will be held from Sept 4 to 5 in Hangzhou. [Photo/Xinhua]

　　Photo taken on Sept 17, 2015 shows the Qiantang river bridge in Hangzhou city, capital of East China's Zhejiang province. The 11th G20 summit will be held from Sept 4 to 5 in Hangzhou. [Photo/Xinhua]

　　Tourists walk on the ancient Guangji bridge in Tangqi Town, Hangzhou city, capital of East China's Zhejiang province, Sept 24, 2015. The 11th G20 summit will be held from Sept 4 to 5 in Hangzhou. [Photo/Xinhua]

　　Photo taken on April 27, 2014 shows the Gongchen bridge in Hangzhou city, capital of East China's Zhejiang province. The 11th G20 summit will be held from Sept 4 to 5 in Hangzhou. [Photo/Xinhua]