Where can I find a sugar-free food store in Nanjing?

There is one next door to Tong Ren Tang Pharmacy at Shuiximen Street 153, jianye district, Nanjing. It's on the right-hand side of the south road of Tongrentang drugstore. Eating sugar-free food does raise blood sugar, but it is much better than eating food containing sucrose. After all, people also need energy. Eat less and eat more meals for reference only.