1, if it can be determined that at the end of the lease term the lessee will obtain the ownership of the leased asset, the lease should be used as the beginning of the lease the useful life of the leased asset as the depreciation of the useful life.
2, if it is not certain that the lessee can obtain ownership of the leased asset at the end of the lease term, the depreciable life should be the shorter of the lease term and the useful life of the leased asset (generally for the lease term).
The above is for reference only, please verify and follow the law.