Negotiation first, no arbitration. According to the Measures for Training Management of Central and State Organs, within the comprehensive limit of training fee reimbursement, training plan approval documents, training notices, attendance sheets of actual trainees, receipts issued by training institutions, expense details and other vouchers should be provided, while within the scope of teachers' expenses, lecture fee receipts or contracts should be provided. Reimbursement of transportation, accommodation and meals shall be based on the actual training time. If you don't reimburse on weekends, you can negotiate with the unit to solve it. If negotiation fails, you can complain to the labor inspection department or file a labor arbitration.