〖Question〗The Chinese Zisha gold merchant’s tripod mark, the seal on the bottom of the pot is the gold merchant’s tripod mark, who made the purple sand pot.

〖Answer〗Hello, it is not "Jinshang Dingbao", it is: Jinding trademark. It was the trademark of Wu Desheng Zisha Pottery Company of Wu Hanwen during the Republic of China.

〖Information〗Wu Desheng Zisha Pottery Shop was established by Wu Hanwen in the fifth year of the Republic of China (1916) during the Republic of China. The store is located on the edge of Jiaoqiao, Yixing County. In the early days, the seal was "Wu Desheng", a small square seal in Yangwenxuan script, and the bottom cover was also used. Later, the seal was used as the Dafang seal of Yang Wenxuan's script "made by Wu Desheng". The seal used in the middle period was the large round seal, and the Yangwenxuan calligraphy was "Wu Desheng system" or "Yixing Wu Desheng system". In the late 1920s, shop owner Wu Hanwen founded the famous trademark "Jinding Trademark" of the "Wu Desheng" store. The "Jinding Trademark" seal has a tripod as a pattern in the center and "Jinding Trademark" in Yangwen regular script on the four corners. It is a special seal for ordering pots with the store number of "Wu Desheng". In the later period, Wu Hanwen also used the square seal "Songhexuan" in Yangwen regular script to seal the refined pots. The bottom of the pot is stamped with "Wu Desheng" and "Jinding Trademark", and the lid usually has the small square seal of the pot maker. At that time, there were Yanru, Chu Yinlan, Wang Xichen, Feng Guilin, etc. who made purple sand teapots specifically for Wu Desheng. They were specially inscribed for Wu Desheng. Among the famous artists are Ren Ganting, and those who often order blanks include Yu Guoliang, Cheng Shouzhen, Zhu Kexin, Wang Baogen, Wu Yungen, Wang Yinchun, etc. In the 14th year of the Republic of China (1925), Wu Hanwen opened a branch of "Wu Desheng" in Shanghai, mainly selling purple sand products. The early teapots made by Wu Hanwen also used the "Wu Desheng" style. After the outbreak of the Anti-Japanese War, "Wu Desheng" closed down, and the "Wu Desheng" and "Jinding Trademark" seals were still used until the end of 1939.