Chicken Bai Zi is the kidney of chicken. Chicken kidney is an organ of chicken, belonging to the urinary system, which is responsible for filtering impurities in blood, maintaining the balance between body fluids and electrolytes, and finally discharging urine from the body through subsequent pipes; At the same time, it also has endocrine function to regulate blood pressure.

Bai Zi is a Japanese name, which means "white child". In fact, it is the gonad of male cod, anglerfish and puffer fish. After cooking, fish white will be creamy and gelatinous, and it is regarded as the best tonic because it is rich in protein.

Japanese bird-burning shop:

Now in Japan, butcher shops and bird-burning shops are excellent choices if you want to catch all the internal organs of animals. In a butcher shop, you will be surprised to find that roasting the internal organs of animals will be called hormone burning. After eating the internal organs, the energy doubles and the hormones explode, which is just one of the sources of this word.

another way to put it, this word is a homonym of "discarded things" in Japanese, because the internal organs were not valued originally, but people made good use of them and made them into popular food.