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Fair Value Measurement	12 Months Ended
	Dec. 31, 2020
Fair Value Measurement
Fair Value Measurement	22. Fair Value Measurement When available, the Group uses quoted market prices to determine the fair value of an asset or liability. If quoted market prices are not available, the Group will measure fair value using valuation techniques that use, when possible, current market-based or independently sourced market parameters, such as interest rates and currency rates. The Group measures investments in money market funds, financial products and equity investments in publicly traded companies at fair value. Money market funds and equity investments in publicly traded companies. The Group values its money market funds and equity investments in publicly traded companies using observable inputs that reflect quoted prices for securities with identical characteristics, and accordingly, the Group classifies the valuation techniques that use these inputs as Level 1. Financial products. The Group values its financial products investments held in certain banks or other financial institutions using quoted prices for securities with similar characteristics and other observable inputs, and accordingly, the Group classifies the valuation techniques that use these inputs as Level 2. Accounts receivable, amount due from/to related parties and other current assets are financial assets with carrying values that approximate fair value due to their short-term nature. Accounts payable and accrued liabilities and other payables are financial liabilities with carrying values that approximate fair value due to their short-term nature. The Group measures equity investments accounted for using the equity method at fair value on a non-recurring basis only if an impairment charge were to be recognized. Equity investments accounted for using the measurement alternative are generally not categorized in the fair value hierarchy. However, if equity investments without readily determinable fair values were re-measured during the years ended December 31, 2018, 2019 and 2020, they were classified within Level 3 in the fair value hierarchy because the Group estimated the value of the instruments based on valuation methods using the observable transaction price at the transaction date and other unobservable inputs.

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- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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