First of all, if the lease contract clearly stipulates how to deal with the lessee's arrears of rent, it should be handled in accordance with the lease contract of both parties.
Secondly, if there is no agreement in the lease contract between the two parties or the handling of the lessee's arrears of rent is unclear, according to Article 722 of the Civil Code: if the lessee fails to pay or delays the payment of rent without justifiable reasons, the lessor may require the lessee to pay within a reasonable period of time; If the lessee fails to pay within the time limit, the lessor may terminate the contract. In the specific operation, you can send a reminder letter, a lawyer's letter, etc. You can also send a letter to cancel the lease contract and ask the other party to vacate the house and bear the liability for breach of contract.
Third, the lessor can also negotiate with the lessee to solve the problem. If negotiation fails, or the tenant refuses to pay, he can bring a lawsuit to the court. The lessor has the right to terminate the contract and ask the other party to bear the liability for breach of contract.