![Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)](http://www.ecns.cn/hd/2018/07/26/13ae6a488df546bfb43aa525fbff7aff.jpg)
Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)
![Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)](http://www.ecns.cn/hd/2018/07/26/605d171b48004d51bfc4f4a805518dde.jpg)
Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)
![Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)](http://www.ecns.cn/hd/2018/07/26/02f437ca318f406fb8751e667d7b37c3.jpg)
Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)
![Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)](http://www.ecns.cn/hd/2018/07/26/d6e0c69c85d549068b53182cf2f8c999.jpg)
Flocks of swallows fly in the sky at sunset in Jiaji Town, Qionghai City, South China’s Hainan Province, July 25, 2018. (Photo: China News Service/Meng Zhongde)