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Consolidated Statements of Comprehensive Income In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY
Net revenues:
Advertising services	$ 241,678us-gaap_AdvertisingRevenue	1,499,516us-gaap_AdvertisingRevenue	894,937us-gaap_AdvertisingRevenue	592,622us-gaap_AdvertisingRevenue
Dealer subscription services	102,091us-gaap_SubscriptionRevenue	633,433us-gaap_SubscriptionRevenue	321,611us-gaap_SubscriptionRevenue	139,898us-gaap_SubscriptionRevenue
Total net revenues	343,769us-gaap_SalesRevenueNet	2,132,949us-gaap_SalesRevenueNet	1,216,548us-gaap_SalesRevenueNet	732,520us-gaap_SalesRevenueNet
Cost of revenues	(61,486)us-gaap_CostOfRevenue	(381,498)us-gaap_CostOfRevenue	(252,236)us-gaap_CostOfRevenue	(178,240)us-gaap_CostOfRevenue
Gross profit	282,283us-gaap_GrossProfit	1,751,451us-gaap_GrossProfit	964,312us-gaap_GrossProfit	554,280us-gaap_GrossProfit
Operating expenses:
Sales and marketing expenses	(90,106)us-gaap_SellingAndMarketingExpense	(559,070)us-gaap_SellingAndMarketingExpense	(245,228)us-gaap_SellingAndMarketingExpense	(129,796)us-gaap_SellingAndMarketingExpense
General and administrative expenses	(20,912)us-gaap_GeneralAndAdministrativeExpense	(129,751)us-gaap_GeneralAndAdministrativeExpense	(82,529)us-gaap_GeneralAndAdministrativeExpense	(83,153)us-gaap_GeneralAndAdministrativeExpense
Product development expenses	(25,529)us-gaap_ResearchAndDevelopmentExpense	(158,395)us-gaap_ResearchAndDevelopmentExpense	(81,651)us-gaap_ResearchAndDevelopmentExpense	(42,865)us-gaap_ResearchAndDevelopmentExpense
Operating profit	145,736us-gaap_OperatingIncomeLoss	904,235us-gaap_OperatingIncomeLoss	554,904us-gaap_OperatingIncomeLoss	298,466us-gaap_OperatingIncomeLoss
Interest income	5,590us-gaap_InterestIncomeDepositsWithFinancialInstitutions	34,682us-gaap_InterestIncomeDepositsWithFinancialInstitutions	11,082us-gaap_InterestIncomeDepositsWithFinancialInstitutions	5,093us-gaap_InterestIncomeDepositsWithFinancialInstitutions
Interest expense	0us-gaap_InterestExpense	0us-gaap_InterestExpense	(414)us-gaap_InterestExpense	0us-gaap_InterestExpense
Other income, net	410us-gaap_OtherNonoperatingIncomeExpense	2,544us-gaap_OtherNonoperatingIncomeExpense	2,884us-gaap_OtherNonoperatingIncomeExpense	310us-gaap_OtherNonoperatingIncomeExpense
Income before income taxes	151,736us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	941,461us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	568,456us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	303,869us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax expense	(31,071)us-gaap_IncomeTaxExpenseBenefit	(192,781)us-gaap_IncomeTaxExpenseBenefit	(112,294)us-gaap_IncomeTaxExpenseBenefit	(90,988)us-gaap_IncomeTaxExpenseBenefit
Net income	120,665us-gaap_NetIncomeLoss	748,680us-gaap_NetIncomeLoss	456,162us-gaap_NetIncomeLoss	212,881us-gaap_NetIncomeLoss
Earnings per share for ordinary share:
Basic	$ 1.13us-gaap_EarningsPerShareBasic	7.01us-gaap_EarningsPerShareBasic	4.57us-gaap_EarningsPerShareBasic	2.13us-gaap_EarningsPerShareBasic
Diluted	$ 1.07us-gaap_EarningsPerShareDiluted	6.64us-gaap_EarningsPerShareDiluted	4.37us-gaap_EarningsPerShareDiluted	2.12us-gaap_EarningsPerShareDiluted
Shares used in earnings per share computation:
Basic	0us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	0us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	0us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	100,000,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted	0us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	0us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	0us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	100,650,652us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Other comprehensive income, net of tax of nil
Foreign currency translation adjustments	636us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3,946us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1,403us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	583us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Comprehensive income	$ 121,301us-gaap_ComprehensiveIncomeNetOfTax	752,626us-gaap_ComprehensiveIncomeNetOfTax	457,565us-gaap_ComprehensiveIncomeNetOfTax	213,464us-gaap_ComprehensiveIncomeNetOfTax

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Revenue from the sale of advertising time (such as television and radio) or space (newspaper or magazine pages). May also include advertising, marketing and promotional services rendered during the reporting period.

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