Aerial photo taken on Oct. 8, 2020 shows sightseeing boats in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows a view in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows a sightseeing boat in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows sightseeing boats in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows sightseeing boats in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows sightseeing boats in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows sightseeing boats in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)

Aerial photo taken on Oct. 8, 2020 shows sightseeing boats in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Weng Xinyang)