Accrued liabilities and other current liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2017 CNY (¥)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 CNY (¥)
Revenue sharing fees	¥ 839,745		¥ 521,654
Salaries and welfare	220,539		200,606
Marketing and promotion expenses	109,901		68,243
Bandwidth costs	102,064		86,186
Value added taxes and other taxes payable	23,204		56,677
Deposits from content providers and suppliers	22,140		18,779
Other payable to content providers	20,849		22,725
Others	127,521		91,168
Total	¥ 1,465,963	$ 225,314	¥ 1,066,038

Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of liabilities incurred through that date and payable for statutory sales and use taxes, including value added tax. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for the expenses of internet-based bandwidth.

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Carrying value as of the balance sheet date of liabilities incurred through that date and payable for revenue sharing fees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle, if longer).

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