FAIR VALUE MEASUREMENTS	12 Months Ended
FAIR VALUE MEASUREMENTS	Dec. 31, 2020
FAIR VALUE MEASUREMENTS
FAIR VALUE MEASUREMENTS	3. FAIR VALUE MEASUREMENTS The Group's financial instruments mainly include cash and cash equivalent, restricted cash, short-term investments, accounts receivable, prepayments and other current assets, amount due from and due to related parties, long-term time deposit, accounts payable, short-term loan, payable to riders and drivers, and notes payable. The carrying amounts of these short-term financial instruments approximate their fair value due to their short-term nature. The carrying values of long-term time deposits approximate their fair values as their interest rates are comparable to the prevailing interest rates in the market. As of December 31, 2019 and 2020, the Group's wealth management products that are measured at fair value on a recurring basis subsequent to their initial recognition amounted to RMB242,567 and RMB470,000, respectively. The fair values of wealth management products are measured based on market-based redemption prices which are level 2 inputs provided by the bank that sells such wealth management products. The gains from the change in fair values of wealth management products recorded in interest income in consolidated statements of operations and comprehensive loss are RMB12,263, RMB6,928, and RMB7,855 for the years ended December 31, 2018, 2019 and 2020, respectively. Certain non-financial assets are measured at fair value on a nonrecurring basis, including property and equipment, operating lease right-of-use assets, goodwill and intangible assets and they are recorded at fair value only when impairment is recognized by applying unobservable inputs such as forecasted financial performance and discount rate to the discounted cash flow valuation methodology. During the year ended December 31, 2018, the Group terminated its unmanned retail shelves business and wrote off the related property and equipment of RMB8,481. The Group did not recognize any impairment of property and equipment during the years ended December 31, 2019 and 2020.

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.