Some hospitals have ID cards that can be used directly as a visiting card, which can be recharged for outpatient payments and so on. I don't know if your local hospital has such a rule. If you don't understand I would suggest asking the doctor directly about the 100 RMB usage.
Hospital (Hospital) is a word from Latin, the original meaning is "guest", because at the beginning of the establishment, it is for people to take refuge, but also have a rest room, so that people are comfortable, with the intention of hospitality, and later, only gradually become to meet the needs of the human medical care, medical services, professional institutions
Hospitals are medical institutions that carry out the necessary medical examinations, therapeutic measures, nursing techniques, reception services, rehabilitation equipment, rescue and transportation for patients in accordance with laws, regulations and industry norms, with the main purpose of saving lives and helping the injured.
The object of their services include not only the symptomatic sick and wounded, but also the elderly who are unable to take care of themselves or whose activities are restricted and who are dependent on medical care, and the severely ill and wounded who are assessed by the forensic physician to be dependent on medical care or whose condition is unstable and in need of long-term rehabilitation with frequent observation and examination, or who are in other specific situations and groups of people.
such as healthy people (such as pregnant women, maternity, newborns) and completely healthy people (such as people who come to the hospital for physical examination or oral cleaning), initially set up for people to take refuge, but also has entertainment programs, so that the visitor is comfortable, with the intention of hospitality, and later, only gradually become a specialized institution for the reception and treatment of patients.
History of Hospitals in China
China was one of the first countries to set up hospitals. As far back as the Western Han Dynasty, when plague was prevalent along the Yellow River, Liu Che, Emperor Wu of the Han Dynasty, set up places of healing in various places, equipped with doctors, medicines, and free treatment for the people.