Credible. Dr. Kang 'er Jiangbu has rich clinical experience and published "The Whole Book of Reducing Blood Sugar" to help people learn a healthy lifestyle of reducing blood sugar, so it is credible. Reducing sugar book is a book published by Beijing joint publishing company in 2022, which comprehensively expounds the knowledge about reducing sugar diet, including its efficacy, principle, law, practical skills, Chinese food recipes and so on.