![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/1a81647cca91496daa47d42b7f3eb5c9.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)
![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/2e6f57b69c9c4c9d823652d62e0b2624.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)
![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/6d2109c723254593b213e9cf072369cd.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)
![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/3e2e7fcb04914eb6919af10d531497e0.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)
![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/a5303e0c17f3414d8808d84659a1bd86.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)
![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/8fcbb9cfd2bb4029910a6cd78ebe419e.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)
![A subway train themed on Tang Dynasty (618-907) was launched in Xi\'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)](http://www.ecns.cn/hd/2018/06/20/b126196ae81d4d8788c2a706a241e9ff.jpg)
A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi Province, on June 18, 2018. (Photo/China Daily)