In Lanzhou, you can go to Lanzhou Li Jinfeng CNC Tool Co., Ltd. or Gansu Qianmufang Tool Co., Ltd. to grind a kitchen knife. The former is located 520 meters south of the intersection of South Ring Road and Xijin West Road in Qilihe District, Lanzhou City, Gansu Province, and provides services such as initial processing and sales of tools, tool maintenance, tool maintenance and polishing. The latter is located at 24th floor, Building 9 1 Floor, Heping Yidecheng Furniture Building Materials Zone, Yuzhong County, Lanzhou City, Gansu Province, and mainly provides tools maintenance, tool system repair, lighting polishing and other services.