![](http://www.ecns.cn/hd/2019/12/30/48eedb9fb82e40efb8ff092dc03eddd5.jpg)
The Tokyo Tatsumi International Swimming Center is pictured in Tokyo, Japan, December 30, 2019. (Photo/Agencies)
![](http://www.ecns.cn/hd/2019/12/30/30681d3795694a15aaf1ef84f793381f.jpg)
The Tokyo Tatsumi International Swimming Center is seen behind the safety wall of a construction site in Tokyo, Japan, December 30, 2019. The characters read: "Safety First". (Photo/Agencies)
![](http://www.ecns.cn/hd/2019/12/30/a56baf37ecb7473394933527a61765d7.jpg)
The Tokyo Tatsumi International Swimming Center is pictured in Tokyo, Japan, December 30, 2019. (Photo/Agencies)