A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on Monday. The pictures and cultural symbols painted on the train reflect the prosperity of the Tang Dynasty. (Photo by Gou Bingchen for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Gou Bingchen for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Gou Bingchen for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Gou Bingchen for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Gou Bingchen for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Huo Yan for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Huo Yan for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Huo Yan for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Huo Yan for China Daily)

A subway train themed on Tang Dynasty (618-907) was launched in Xi'an, Shaanxi province, on June 18, 2018. (Photo by Huo Yan for China Daily)