Coin Item Number: Edz2841 from the MOA: University of British Columbia
Round, 4-sided hole in centre, rims around outer edge and centre hole, obverse 4 characters, line on reverse. Kaiyuan tongbao (top-bottom-right-left) in orthodox Chinese characters on obverse; inverted crescent (bottom) on reverse. Broken inner rim left-bottom obverse, top-left reverse; centre hole off centre of inner rim reverse.
Normal sized circulating coin