Accounting Assumptions(会计假设) :  The accounting assumptions are the prerequisites for the organization of accounting and accounting work. They are the basis for establishing accounting principles and the necessary condition for conducting accounting practices.

Accounting Entity(会计主体) : The accounting entity assumption, also called the economic entity,  is an accounting principle or guideline that allows the accountant to keep the business transactions separate from the owner s personal transactions.

Going Concern(持续经营 ) :  The going concern assumption,also called the continuity assumption,is an accounting guideline which allows the readers of financial statements to assume that the company will continue on long enough to carry out its objectives and commitments. In other words, the accountants believe that the company will not liquidate in the nearfuture. This assumption also provides some justification for accountants to follow the cost principle.

Accounting Period(会计分期）: The accounting period assumption ,also known as the periodicity or time period assumption, is an accounting guideline that allows the accountantto divide up the complex,ongoing activities of a business into periods of a year, quarter, month,week, etc. The precise time period covered is included int he heading of the income statement,statement of cash flows,   and the statement of stockholders ‘equity.

Monetary Unit(货币计量) : The monetary unit assumption refers to the accounting guideline where the currency is assumed to be constant (no change in purchasing power) over time.