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CONSOLIDATED BALANCE SHEETS (Parenthetical) ¥ in Thousands, $ in Thousands	Dec. 31, 2019 CNY (¥) shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 CNY (¥) shares	Dec. 31, 2018 $ / shares	Mar. 31, 2018 shares	Sep. 18, 2015 $ / shares shares	Sep. 18, 2015 ¥ / shares shares
Accrued expenses and other current liabilities	¥ 435,225	$ 62,516	¥ 455,284
Deferred revenue, current	1,670,076	239,891	1,765,085
Lease liabilities, current	40,236	5,780
Payables to acquire buildings	61,540	8,840	61,540
Long-term debt, current	32,500	4,668	32,500
Deferred revenue, non-current	1,558,694	223,892	1,520,940
Lease liabilities, non-current	616,246	88,518
Deferred tax liabilities	87,954	12,634
Other non-current liabilities	11,469	1,647	17,147
Long-term debt, non-current	¥ 193,125	$ 27,741	¥ 225,625
Ordinary shares, par value | (per share)						$ 0.00005	¥ 0.0003
Ordinary shares, shares authorized						1,000,000,000	1,000,000,000
Ordinary shares, shares issued						1	1
Ordinary shares, shares outstanding					4,329,000
Class A Ordinary Shares
Ordinary shares, par value | $ / shares		$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	796,062,195	796,062,195	796,062,195
Ordinary shares, shares issued	1,830,183	1,830,183	1,818,383
Ordinary shares, shares outstanding	1,728,006	1,728,006	1,773,301		63,714
Class B Ordinary Shares
Ordinary shares, par value | $ / shares		$ 0.00005		0.00005
Ordinary shares, shares authorized	826,389	826,389	826,389
Ordinary shares, shares issued	826,389	826,389	826,389
Ordinary shares, shares outstanding	826,389	826,389	826,389
Class C Ordinary Shares
Ordinary shares, par value | $ / shares		$ 0.00005		$ 0.00005
Ordinary shares, shares authorized	203,111,416	203,111,416	203,111,416
Ordinary shares, shares issued	4,258,686	4,258,686	4,265,286
Ordinary shares, shares outstanding	4,258,686	4,258,686	4,265,286		4,265,286
VIEs
Accrued expenses and other current liabilities | ¥	¥ 209,727		¥ 241,204
Deferred revenue, current | ¥	1,162,938		1,765,085
Lease liabilities, current | ¥	22,659
Deferred revenue, non-current | ¥	1,096,482		1,520,940
Lease liabilities, non-current | ¥	358,467
Deferred tax liabilities | ¥	4,415
Other non-current liabilities | ¥	¥ 135		¥ 135

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Carrying value as of the balance sheet date of payables to acquire buildings. 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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