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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 USD ($) | Dec. 31, 2011 CNY | Dec. 31, 2010 CNY | Dec. 31, 2009 CNY | Dec. 31, 2011 Common Class A and Class B USD ($) | Dec. 31, 2011 Common Class A and Class B CNY | Dec. 31, 2010 Common Class A and Class B CNY | Dec. 31, 2009 Common Class A and Class B CNY
Revenues: |  |  |  |  |  |  |  |
Online marketing services | $ 2,302,192 | 14,489,767 | 7,912,869 | 4,445,310 |  |  |  |
Other services | 1,751 | 11,019 | 2,205 | 2,466 |  |  |  |
Total revenues | 2,303,943 | 14,500,786 | 7,915,074 | 4,447,776 |  |  |  |
Operating costs and expenses: |  |  |  |  |  |  |  |
Cost of revenues | (619,153) | (3,896,883) | (2,149,288) | (1,616,236) |  |  |  |
Selling, general and administrative | (268,961) | (1,692,810) | (1,088,980) | (803,988) |  |  |  |
Research and development | (212,020) | (1,334,434) | (718,038) | (422,615) |  |  |  |
Total operating costs and expenses | (1,100,134) | (6,924,127) | (3,956,306) | (2,842,839) |  |  |  |
Operating profit | 1,203,809 | 7,576,659 | 3,958,768 | 1,604,937 |  |  |  |
Other income: |  |  |  |  |  |  |  |
Interest income, net | 53,329 | 335,650 | 67,121 | 32,661 |  |  |  |
Foreign exchange (loss) gain, net | (311) | (1,959) | 6 | (42) |  |  |  |
Loss from equity method investments | (28,505) | (179,408) | (8,965) | (229) |  |  |  |
Other income, net | 12,431 | 78,237 | 44,233 | 45,794 |  |  |  |
Total other income | 36,944 | 232,520 | 102,395 | 78,184 |  |  |  |
Income before income taxes | 1,240,753 | 7,809,179 | 4,061,163 | 1,683,121 |  |  |  |
Income taxes | (188,891) | (1,188,861) | (535,995) | (198,017) |  |  |  |
Net income | 1,051,862 | 6,620,318 | 3,525,168 | 1,485,104 |  |  |  |
Net loss attributable to noncontrolling interests | (2,911) | (18,319) | 0 | 0 |  |  |  |
Net income attributable to Baidu, Inc. | 1,054,773 | 6,638,637 | 3,525,168 | 1,485,104 |  |  |  |
Earnings per share for Class A and Class B ordinary shares: |  |  |  |  |  |  |  |
Net income attributable to Baidu, Inc. -Basic |  |  |  |  | $ 30.23 | 190.27 | 101.28 | 42.96
Net income attributable to Baidu, Inc. -Diluted |  |  |  |  | $ 30.17 | 189.88 | 100.96 | 42.70
Earnings per ADS (1 Class A ordinary share equals 10 ADSs): |  |  |  |  |  |  |  |
Net income attributable to Baidu, Inc. -Basic |  |  |  |  | $ 30.23 | 190.27 | 101.28 | 42.96
Net income attributable to Baidu, Inc. -Diluted |  |  |  |  | $ 30.17 | 189.88 | 100.96 | 42.70
Weighted average number of Class A and Class B ordinary shares outstanding |  |  |  |  |  |  |  |
Basic |  |  |  |  | 34,890,050 | 34,890,050 | 34,805,362 | 34,570,790
Diluted |  |  |  |  | 34,962,831 | 34,962,831 | 34,917,835 | 34,776,366
Other comprehensive income (loss), net of tax |  |  |  |  |  |  |  |
Foreign currency translation adjustment | 5,233 | 32,930 | (3,611) | (3,961) |  |  |  |
Unrealized gains on available-for-sale securities | 7 | 45 | 0 | 0 |  |  |  |
Other comprehensive income (loss), net of tax | 5,240 | 32,975 | (3,611) | (3,961) |  |  |  |
Comprehensive income | 1,057,102 | 6,653,293 | 3,521,557 | 1,481,143 |  |  |  |
Comprehensive loss attributable to noncontrolling interests | (3,069) | (19,314) | 0 | 0 |  |  |  |
Comprehensive income attributable to Baidu, Inc. | $ 1,060,171 | 6,672,607 | 3,521,557 | 1,481,143 |  |  |  |

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