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FAIR VALUE MEASUREMENT (Tables) | 12 Months Ended
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Dec. 31, 2011
Assets Measured at Fair Value on Recurring Basis | Assets measured at fair value on a recurring basis are summarized below (in thousands):
|  | Fair value measurement at December 31, 2010 using |  |  |  |
|  | Quoted prices in active markets for identical assets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |  |  | Total fair value at December 31, 2010 |
| RMB |  |  | RMB |  |  | RMB |  |  | RMB |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  | 3,905,479 |  |  |  | — |  |  |  | — |  |  |  | 3,905,479 |
Money market fund |  |  | 993,047 |  |  |  | — |  |  |  | — |  |  |  | 993,047 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate investments |  |  | — |  |  |  | 375,234 |  |  |  | — |  |  |  | 375,234 |
Long-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  |  | — |  |  |  | — |  |  |  | 24,814 |  |  |  | 24,814 |
|  |  | 4,898,526 |  |  |  | 375,234 |  |  |  | 24,814 |  |  |  | 5,298,574 |
|  | Fair value measurement at December 31, 2011 using |  |  | Total fair value at December 31, 2011 |
|  | Quoted prices in active markets for identical assets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |  |
| RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  | 2,419,726 |  |  |  | — |  |  |  | — |  |  |  | 2,419,726 |  |  |  | 384,456 |
Money market fund |  |  | 192,324 |  |  |  | — |  |  |  | — |  |  |  | 192,324 |  |  |  | 30,557 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate investments |  |  | — |  |  |  | 9,834,275 |  |  |  | — |  |  |  | 9,834,275 |  |  |  | 1,562,509 |
Adjustable-rate investments |  |  | — |  |  |  | 100,027 |  |  |  | — |  |  |  | 100,027 |  |  |  | 15,893 |
Available-for-sale securities |  |  | — |  |  |  | 102,682 |  |  |  | — |  |  |  | 102,682 |  |  |  | 16,314 |
|  |  | 2,612,050 |  |  |  | 10,036,984 |  |  |  | — |  |  |  | 12,649,034 |  |  |  | 2,009,729 |
Reconciliation for Assets Measured and Recorded at Fair Value on Recurring Basis, Using Significant Unobservable Inputs (Level 3) | The following table presents a reconciliation for the Company’s assets measured and recorded at fair value on a recurring basis, using significant unobservable inputs (Level 3) for the year ended December 31, 2011 (in thousands):
|  | Significant unobservable inputs (Level 3) |
|  | RMB |  |  | US$ |
Balance at December 31, 2010 |  |  | 24,814 |  |  |  | 3,942 |
Settlements |  |  | (24,814 | ) |  |  | (3,942 | )
Change in unrealized gain (loss) included in other comprehensive income |  |  | — |  |  |  | — |
Balance at December 31, 2011 |  |  | — |  |  |  | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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