Depreciation life determined after considering intangible losses of fixed assets.

Depreciation life of fixed assets and intangible assets: 20 years for houses and buildings; Aircraft, trains, ships, machines, machinery and other production equipment, 10 year; Appliances, tools and furniture related to production and business activities are 5 years; Four years for vehicles other than airplanes, trains and ships; Electronic equipment, 3 years. The amortization period of intangible assets shall not be less than 10 year.

I. Depreciation of fixed assets

Depreciation of fixed assets refers to the value of fixed assets gradually lost in use and transferred to commodities or expenses, and it is also the consumption of common parts of fixed assets during the service life of enterprises due to the use of fixed assets in production and operation. Determining the depreciation range of fixed assets is the premise of depreciation accrual.

Two. invisible assets

Intangible assets refer to identifiable non-monetary assets that have no physical form and are owned or controlled by enterprises. Intangible assets can be divided into broad sense and narrow sense. Intangible assets in a broad sense include monetary funds, accounts receivable, financial assets, long-term equity investment, patent rights, trademark rights and so on. Because they have no material entity, they show some legal rights or technologies.

Third, the depreciation period of intangible assets

The depreciation period of intangible assets varies according to the benefit period stipulated in the contract, ranging from 1 to 10. The depreciation of intangible assets adopts the straight-line method, and accounting requires intangible assets to be amortized within the expected service life.