In China, it is commonly known as German shepherd. Black back and wolf green are both called German shepherd dogs. The black back is bigger than the wolf green, and the fur is thicker than the wolf green.

The head is wedge-shaped, the outline is obvious, the skin is thin and tender, the face is slightly longer, and the eyes are almond-colored, dark brown or apricot yellow. The teeth are scissors-shaped, the bridge of the nose is straight, the nose is moist and kagami Kuro, the ears are naturally upright, the size is moderate and flexible, the chest depth is slightly narrow, the back and waist are straight, the chest bulges backwards through the abdomen, and the abdominal circumference is small. The coat colors are wolf blue, black back, yellow belly and grass yellow, and the coat colors of the three strains are relatively short. The tail is sword-shaped or structural, and the length is not less than the attached joint. When excited, the tail is tilted above the horizontal line of the back and waist.

Features strong attachment, excitement and liveliness. There are three strains of this variety. Langqing strain is easy to achieve the balance of excitement and inhibition, and its performance and working ability in tracking, identifying and biting are relatively comprehensive. The yellow grass strain is also excited for a long time, with strong athletic ability and strong tracking ability, which is not easy to suppress after excitement. The black-backed strain is well prepared, fierce and aggressive, active and aggressive, and alert. Used in our army and public security criminal investigation front, widely used in border patrol, investigation and solving cases, drugs and explosives detection. It can also be used as a guard dog for units and individuals.

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