to lift or hold an object in the hand and move it slightly up and down to estimate its weight

A unit of weight; one catty. In mainland China, it is exactly 500 grams (0.5 kg). In Taiwan, it is 600 grams. In Hong Kong and Southeast Asia, it is approximately 604.8 grams.

to smear, apply, or plaster; to brush or wipe away; to strike out or erase (e.g. from a list); to reduce to zero (of decimals or fractions)

unit of weight equal to 50 grams in the modern market system, or 1/16 of a 斤 jīn (catty) in the traditional system