![](http://www.ecns.cn/hd/2020/04/10/e9eca10cd80d49608fdf241d8e577db6.jpg)
Black swans are seen at the Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region, April 9, 2020. (Xinhua/Zhou Hua)
![](http://www.ecns.cn/hd/2020/04/10/e94cf405c2ae4340862be59978ebdcd3.jpg)
Aerial photo taken on April 9, 2020 shows a view of the Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Cao Yiming)
![](http://www.ecns.cn/hd/2020/04/10/4235772e04184ed8bf7eccde5bff654c.jpg)
Aerial photo taken on April 9, 2020 shows a view of the Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Cao Yiming)
![](http://www.ecns.cn/hd/2020/04/10/b7bc8417db8a47c1bf57ceaaaf761dac.jpg)
Photo taken on April 9, 2020 shows flowers in the Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region . (Xinhua/Zhou Hua)
![](http://www.ecns.cn/hd/2020/04/10/5592ff66af71458fb9cf14f283cb298d.jpg)
Black swans are seen at the Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region, April 9, 2020. (Xinhua/Cui Bowen)
![](http://www.ecns.cn/hd/2020/04/10/2ba24208e74a447f8ddbbd0478f603c3.jpg)
Aerial photo taken on April 9, 2020 shows a view of the Nanning Garden Expo Park in Nanning, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Cao Yiming)