Ban Gu
Ban Gu in his work the Book of Han ("Ch'ien Han Shu") had written that he had seen many unprecedented objects which are unseen at China, at the city of "kuvangtche". Berend, an acoustics expert, annotates that the city named by Ban Gu is analogous with the ancient Chola city "kanchi" (the present day's city of Kancheepuram at Tamil Nadu, India). This proves the relationship of Kanchi with China.