Policemen and police dogs patrol on the square of the Tianjin Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Zhao Hui (R) and guard dog "Fen Di" are on duty at the check-in entrance of the Tianjin Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Han Chaoyang and police dog "Zhui Feng" patrol at the Tianjin West Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Han Chaoyang and police dog "Zhui Feng" patrol at the Tianjin West Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Han Chaoyang and police dog "Zhui Feng" interact with each other at the Tianjin West Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers. (Photos: Xinhua)

Trainer Wang Ji and police dog "Cha Cha" are on duty on a platform of the Tianjin Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Zhao Hui and police dog "Fen Di" go for a rest at the police dog base of the Tianjin branch of the Beijing railway public security bureau after a training session in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Zhao Hui and police dog "Fen Di" take part in a training session at the police dog base of the Tianjin branch of the Beijing railway public security bureau in north China's Tianjin, Jan. 31, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Han Chaoyang and police dog "Zhui Feng" patrol at the Tianjin West Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Wang Ji and police dog "Cha Cha" patrol at the waiting hall of the Tianjin Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Wang Ji and police dog "Cha Cha" are on duty on a platform of the Tianjin Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Wang Ji and police dog "Cha Cha" interact with each other during a rest on the square of the Tianjin Railway Station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.

Trainer Han Chaoyang and police dog "Zhui Feng" check the luggage of passengers at a railway station in north China's Tianjin, Feb. 1, 2021. "Fen Di", a German Dutch hybrid dog and also a guard dog at the Tianjin branch of the Beijing railway public security bureau, has been working and living with its trainer Zhao Hui for three years. There are now a dozen of dogs like "Fen Di" here, who act as guards in the routine patrol and good partners in the training. During this year's Spring Festival travel rush, more patrols for "Fen Di" and its fellow dogs are arranged at the Tianjin Railway Station and Tianjin West Railway Station in order to ensure the safety of passengers.