Introduction to the Nanjing Clock Collection Room: The Nanjing Clock Collection Room is located at No. 193 Duolun Road. It was opened by Mr. Liu Guoding, director of the Watch and Clock Branch of the Shanghai Collecting and Appreciation Association. Mr. Liu has been playing with clocks and clocks with his father since he was a boy, and has formed an indissoluble bond with clocks. He has been collecting ancient Nanjing clocks for more than 30 years, and now has collected more than 70 kinds of Nanjing clocks, forming the Nanjing clock collection series. .