This is a rare 1987 silver 12 oz. 100 Yuan Zhan Tianyou coin, minted by the Chinese Mint. It comes with the original certificate of authenticity and is in excellent condition. The coin features the portrait of Zhan Tianyou, a famous Chinese civil engineer, on the obverse side, and the Chinese emblem and denomination on the reverse side. This coin is a great addition to any coin collection, especially for those interested in Chinese history and culture.