The weight of each set of coins is different. For example, the third set of 1 yuan coins is made of copper-nickel alloy and weighs 9.32g, the fourth set of 1 yuan coins is made of nickel-plated steel core and weighs 6.05g, and the fifth set of 1 yuan coins is made of nickel-plated steel core and weighs 6.1g..

China dollar coin was first issued in 1980. 1979, the People's Bank of China appointed Shenyang Mint to design four new kinds of circulating coins, namely 1, 2, 5 and 1 yuan coins.