I'm not sure about Ningbo. I just bought this medicine two days ago. I bought it in Dongguan at a price of 15.5 yuan. A box of 12 pieces. If you really can't buy it, you can contact the manufacturer to see if you can mail it or ask them where it is sold in Ningbo. This is the website of the instruction manual with the telephone number on it. www.diaocdyy.com