The gram (g) is the base unit of mass in the metric system, defined as one-thousandth of a kilogram. It is the standard measurement for food portions, postal rates, and small objects in daily life across most of the world. One gram equals approximately 0.0353 ounces, and a standard paperclip weighs roughly one gram.

The jin (斤) is a traditional Chinese unit of weight equal to 500 grams, or exactly half a kilogram. It remains the most common weight unit in Chinese markets, groceries, and daily life, where vegetables, meat, and fruit are sold by the jin. One jin equals 1.1023 pounds or exactly 500 grams.