How big is the largest copper coin?

In front of the Guangfu Ancient Temple stands an oversized copper coin designed and manufactured by a famous sculptor in China, Mr. Qian Shaowu, with the inscription "Bao Tong of Taihu Lake" inscribed by Qian Shaowu, "Golden Millennium, beautiful water in spring and autumn". This copper coin, with a diameter of 3.06 meters and a weight of 2.5 tons, was completed in August 1995 and has been listed as the largest copper coin in the Guinness Book of World Records.