What does the medical insurance red book mean?

This certificate is a medical insurance manual for retirees.

The medical insurance red book is public medical care, which refers to veteran cadres. Red is the medical insurance handbook for retirees, and green is the medical insurance handbook for on-the-job employees. The difference is that the threshold cost of hospitalization in the hospital is different. Retirees need to pay more than 300 threshold fees for their first stay in the second-class hospital every year.

You have to pay more than 600 threshold fees when you are on the job. The higher the hospital level, the higher the charging threshold. Retirement at one's own expense is almost the same as working.