Why do police dogs choose males?

In principle, China has no requirements for purebred police dogs.

Among the main dog breeds currently used in China, German Shepherd, Rottweiler, Labrador and Spenger require purebred breeds. German shepherd's hybrid will be ugly. When it is a guard dog, it is not dignified and has no deterrent. Rottweiler can't cross, and how many dogs with the right head are stronger than it; The other three hybrids are of little significance and can be used at present. There are also Malinua and Kunming dogs, and now working dogs use hybrid dogs. Kunming dog, in particular, is a new breed produced by out-and-out hybridization, and the black-backed strain is improved by German shepherd dog.

When we choose a good working dog, the first consideration is whether it has the qualities that an excellent police dog should have, rather than examining its pedigree. Of course, if it is a guard dog, we should consider the appearance of a purebred dog. Generally speaking, you don't think much about appearance with its nose, and you can scare people only by its prestige (purebred or more prestige).