The world's oldest professor, soon to be 108-year-old Zheng Ji at Nanjing University, will give a lecture on how to live a long life Tuesday.
世界最长寿教授、南京大学教授郑集明天将再登讲台，讲述养生理念。
The world's oldest professor, soon to be 108-year-old Zheng Ji at Nanjing University, will give a lecture on how to live a long life Tuesday.
世界最长寿教授、南京大学教授郑集明天将再登讲台，讲述养生理念。
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