Intangible assets with limited useful lives should be amortized using a systematic and reasonable method over their estimated useful lives.

The amortization period is its service life. For example, the land use right is determined according to the time on the land use certificate, and the service life of a trademark is 10 years.

The amortization method should be selected based on the expected consumption pattern of the expected future economic benefits obtained from the intangible asset. Generally, the straight-line method can be used. If there are specific production restrictions, the output method should be used for amortization, such as A franchise or patent with limited output.