Learn about abacuses in Chongchuan
The world’s largest abacus made of red sandalwood is on display at the China Abacus Museum in Chongchuan district, Nantong. [Photo/ntjoy.com]
The abacus is 780.9cm long. Each bead is 28 cm in diameter and 12.5 cm thick. [Photo/ntjoy.com]
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