Visitors view a calligraphy work by Zhang Naijian at the cultural center in Rugao, a county-level city in Nantong, East China's Jiangsu province, on Dec 15. The exhibition contains more than 150 pieces created and donated by Zhang, who was born in Rugao. Now in his 90's, Zhang was once a member of Shanghai calligraphers' association. The exhibition will run until Dec 26. [Photo/WeChat account of Rugaofabu]

Zhang Yaluan, deputy mayor of Rugao, addresses the opening ceremony of the calligraphy exhibition, Dec 15. [Photo/WeChat account of Rugaofabu]

Zhang Naijian (left) and officials showcase one of his calligraphy works at the cultural center in Rugao, Dec 15. [Photo/WeChat account of Rugaofabu]