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CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands, $ in Thousands	Dec. 31, 2018 CNY (¥) shares	Dec. 31, 2017 CNY (¥) shares
Deferred revenue	¥ 124,250	¥ 114,396
Accounts payable	13,583	23,414
Accrued and other liabilities	256,325	418,998
Income taxes payable	207,114	202,314
Amounts due to related parties	¥ 2,696	¥ 3,430
Preferred shares, shares authorized	1,666,667	1,666,667
Preferred shares, shares issued	0	0
Preferred shares, shares outstanding	0	0
Common Class A [Member]
Ordinary shares, shares authorized	66,666,667	66,666,667
Ordinary shares, shares issued	38,756,289	34,206,939
Ordinary shares, shares outstanding	38,756,289	34,206,939
Common Class C [Member]
Ordinary shares, shares authorized	8,333,333	8,333,333
Ordinary shares, shares issued	4,708,415	4,708,415
Ordinary shares, shares outstanding	4,708,415	4,708,415
Variable Interest Entity, Primary Beneficiary [Member]
Deferred revenue | ¥	¥ 116,753	¥ 109,878
Accounts payable | ¥	8,996	19,809
Accrued and other liabilities | ¥	192,302	219,009
Income taxes payable | ¥	206,871	201,810
Amounts due to related parties | ¥	¥ 2,417	¥ 3,430

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. 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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