Your situation is definitely not ideal. It is important for employees to be able to fully disconnect and recharge during their annual leave days. If you feel that your supervisor is overstepping boundaries by requesting work to be done during your leave, it may be a good idea to discuss this with HR or have a clear conversation with your supervisor about your expectations for time off. It is important for companies to respect their employees' need for rest and relaxation, especially during holiday periods like Chinese New Year.