Is the salary before social security deducted from the leave?

No need. Vacation is calculated on the basis of basic salary plus subsidy, so social security will not be deducted. Because employees are not at work during the vacation, their wages are not paid according to the actual amount, but are calculated according to the formula of "daily salary × sick leave salary ratio × sick leave days". The daily wage is not entirely the daily wage of employees, but the result of "monthly wage calculation base ÷ current month wage calculation date". Paid days refer to the system working days plus legal holidays stipulated by the state. For example, under the standard working hours system, paid days mean that the number of days in a month is not included in weekends. Opinions on Several Issues Concerning the Implementation of the Labor Law Article 59 During the treatment of employees' illness or non-work-related injuries, during the prescribed medical treatment period, the enterprise shall pay their sick pay or disease relief expenses in accordance with relevant regulations, which may be lower than the local minimum wage, but not less than 80% of the minimum wage.