Legal analysis: According to China's regulations, the condition for applying for long-term sick leave is that if employees need to apply for long-term sick leave, they must first have a sick leave certificate issued by the hospital.

Legal basis: Provisions on medical treatment period for employees of enterprises who are sick or injured at work Article 3 When employees of enterprises need to stop working for medical treatment due to illness or injury at work, the state stipulates that the maximum number of sick leave days for outpatient service is three months to twenty-four months, depending on their actual working years and working years in their own units: (1) If their actual working years are less than ten years, their working years in their own units are more than three months. (2) Those who have actually worked for more than 10 years, those who have worked in this unit for less than 5 years are dissatisfied with 10 years, those who have worked for less than 9 months 15 years are dissatisfied with 12 months, and those who have worked for less than 5 years are dissatisfied with 18 months/kl.