Zhang Zuren shows abacuses at his home in Fuzhou, East China’s Fujian province on September 9, 2015. He is a collector of over 300 such ancient-style calculator. (Photo: China News Service/ Liu Kegeng)
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Zhang Zuren shows abacuses at his home in Fuzhou, East China’s Fujian province on September 9, 2015. He is a collector of over 300 such ancient-style calculator. (Photo: China News Service/ Liu Kegeng)
