A post-90s woman who has been with police dogs for 13 years. Yu Keying has trained a total of 4 police dogs.
The first police dog she trained was "Mary" who was just six months old. She was injured on the thigh by a dog when she was a child. Now, she tries not to say the word "dog" when speaking. The most difficult thing for her to accept was the accidental injury of 'Mary' to a piece of glass on the training ground.