![Photos show remarkable progress in Hainan(1/9)](http://www.ecns.cn/hd/2018/04/16/aed5739b3f6d41b98be4c2adbbe8ee25.jpg)
Photos taken in February 1991 by Jiang Enyu and April 4, 2018 by Guo Cheng show the changes in Sanya's skyline. (Photo/Xinhua)
Photos taken in February 1991 by Jiang Enyu and April 4, 2018 by Guo Cheng show the changes in Sanya's skyline. (Photo/Xinhua)