Emperor Quang Trung cast Quang Trung thong bao and Quang Trung dai bao coins as well. Historic books written about Tay Son dynasty were destroyed completely by the victor, Nguyen dynasty. There was no record remained to show in which year Quang Trung Dai Bao were cast or which type of coin, thong bao or dai bao, were cast first. Coins were in brass and had characteristics as other Tay Son's coins.