The milligram (mg) is a tiny metric unit of mass equal to one-thousandth of a gram, essential in pharmaceuticals and nutrition labeling. Medication dosages, vitamin content, and food additive quantities are typically expressed in milligrams. One milligram equals approximately 0.0000353 ounces, making it the go-to unit for measuring extremely small masses.

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.