![Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)](http://www.ecns.cn/hd/2018/12/06/3acc47d4663441a2bf2a1aed9d68d49f.jpg)
Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)
![Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)](http://www.ecns.cn/hd/2018/12/06/fe13c93679124f418c9f1c09d7c19a23.jpg)
Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)
![Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)](http://www.ecns.cn/hd/2018/12/06/146963407d534d458026dc0d74433309.jpg)
Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)
![Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)](http://www.ecns.cn/hd/2018/12/06/c78b5704bdab4fea9a08434eda33754e.jpg)
Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)
![Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)](http://www.ecns.cn/hd/2018/12/06/cfc3d1e22e7544c698990fa5291b1508.jpg)
Sanitation workers collect fallen leaves and use them to form various patterns on ground in Qingyang district of Chengdu, Southwest China’s Sichuan province on December 4, 2018. (Photo/VCG)