A guide dog takes a train in northwest China's Shaanxi Province, Jan. 12, 2020. Guide dogs are trained to adapt to taking bullet trains in order to help visually impaired passengers navigate during the Spring Festival travel rush. (Xinhua/Li Yibo)

A guide dog and its trainer get on a train at Baoji South Railway Station in Baoji, northwest China's Shaanxi Province, Jan. 12, 2020. Guide dogs are trained to adapt to taking bullet trains in order to help visually impaired passengers navigate during the Spring Festival travel rush. (Xinhua/Li Yibo)

A guide dog and its trainer take a train in northwest China's Shaanxi Province, Jan. 12, 2020. Guide dogs are trained to adapt to taking bullet trains in order to help visually impaired passengers navigate during the Spring Festival travel rush. (Xinhua/Li Yibo)

A guide dog and its trainer wait to board a train at Baoji South Railway Station in Baoji, northwest China's Shaanxi Province, Jan. 12, 2020. Guide dogs are trained to adapt to taking bullet trains in order to help visually impaired passengers navigate during the Spring Festival travel rush. (Xinhua/Li Yibo)

A guide dog takes a train in northwest China's Shaanxi Province, Jan. 12, 2020. Guide dogs are trained to adapt to taking bullet trains in order to help visually impaired passengers navigate during the Spring Festival travel rush. (Xinhua/Li Yibo)

A guide dog waits to board a train at Xi'an North Railway Station in Xi'an, capital of northwest China's Shaanxi Province, Jan. 12, 2020. Guide dogs are trained to adapt to taking bullet trains in order to help visually impaired passengers navigate during the Spring Festival travel rush. (Xinhua/Li Yibo)