You don't have to be hospitalized for sick leave. As long as it is sick, if it is really necessary to stop working and rest after diagnosis and treatment by a medical practitioner in a medical institution designated by the employer, a medical diagnosis certificate (sick leave) will be issued, and the employer can take a vacation after approval. Doctors who implement medical, preventive and health care measures and sign relevant medical certificates must conduct medical examinations in person. Article 23 of the Law on Medical Practitioners

Legal objectivity:

Article 4 of the Provisions on the Medical Treatment Period of Enterprise Employees Suffering from Illness or Non-work-related Injury, if the medical treatment period is three months, it shall be calculated according to the accumulated sick leave time within six months; For six months, calculate the accumulated sick leave time within twelve months; Nine months is calculated according to the accumulated sick leave time within fifteen months; Twelve months is calculated according to the accumulated sick leave time within eighteen months; Eighteen months is calculated according to the accumulated sick leave time within twenty-four months; Twenty-four months is calculated according to the accumulated sick leave time within 30 months.