legal ground
Article 7 16 of the civil code
With the consent of the lessor, the lessee may sublet the lease item to a third party. If the lessee sublets, the lease contract between the lessee and the lessor shall remain valid; If a third party causes losses to the lease item, the lessee shall compensate for the losses. If the lessee sublets without the consent of the lessor, the lessor may terminate the contract.
Chapter seven hundred and seventeen
Where the lessee subleases the leased property to a third party with the consent of the lessor, if the sublease term exceeds the remaining lease term of the lessee, the agreement on the excess part is not legally binding on the lessor, unless otherwise agreed by the lessor and the lessee.