SFDA had permitted a portable digital GLU instrument to be sold in these days. This instrument which test content of sugar in urine will help the patients to detect blood sugar expediently and quickly.    Li Liubo who is the nutritionist in public health college of Beijing University pointed out that diabetics shall choose logical tools to detect the changes of blood sugar. They need to check the blood sugar after dinner. Testing urine sugar is an indirection as painless, expediently and persisent method of checking blood sugar. She also said checking urine sugar can not replace blood sugar inspection.