According to the measurement unit in China, it is known that a kilo is equal to 500g, a kilo is equal to 2 kilos, and the weight of a kilo of chicken is 500g. The measurement unit of weight has been used for a long time. As early as the Shang Dynasty, it has been used to measure the weight in kilos and second-class units.

With the increase of international exchanges, China has also begun to adopt the international system of units, that is, kilograms and grams, but the kilograms and grams are still in use.