If the boss is an individual (employment relationship), bring a lawsuit to the district people's court at the place of work or where the boss is located, and ask the court to decide to pay the salary.
Legal basis: People's Republic of China (PRC) Labor Law.
Article 50 Wages shall be paid to labourers themselves on a monthly basis in the form of currency. The wages of workers shall not be deducted or delayed without reason.
Article 51 During legal holidays, wedding and funeral leave and participation in social activities according to law, the employing unit shall pay wages according to law.