Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery on boat in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery on boat in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists walking on the Duanqiao Bridge (Broken Bridge) in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows a view of a island in the West Lake in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery on boat in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery on boat in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists viewing lotus in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery near the Jixian Pavilion in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery on boat in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Aug. 14, 2018 shows tourists enjoying the scenery on boat in the West Lake scenic area in Hangzhou, capital of east China's Zhejiang Province. (Xinhua/Weng Xinyang)