![A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)](http://www.ecns.cn/hd/2018/07/17/4751975579044a7b8cde01686ac427f0.jpg)
A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)
![A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)](http://www.ecns.cn/hd/2018/07/17/0ebc7b365e4a44ada0b11fcb249b4fcd.jpg)
A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)
![Technicians work on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)](http://www.ecns.cn/hd/2018/07/17/1aa7bfc8c62346f4aa41536161acf2fb.jpg)
Technicians work on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)
![A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)](http://www.ecns.cn/hd/2018/07/17/e4d3e39e26db4ebd81db07119642aa49.jpg)
A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)
![A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)](http://www.ecns.cn/hd/2018/07/17/488addbe4d38473384b9c57f48105ef2.jpg)
A signal inspection technician works on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)
![Technicians work on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)](http://www.ecns.cn/hd/2018/07/17/73e1640bb9084e3c9ec36164c1e5199e.jpg)
Technicians work on a railway track as temperatures reach a high of 36 degrees centigrade in Hangzhou City, East China’s Zhejiang Province, July 16, 2018. (Photo: China News Service/Wang Gang)