one half; semi-; specifically used after a number and a measure word to mean "and a half"

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.

eight; 8

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