Segment Information (Tables)

12 Months Ended

Dec. 31, 2019

Segment Information

Schedule of segment information

			For the year ended
	Dec. 31,		Dec. 31,		Dec. 31,		Dec. 31,
	2017		2018		2019		2019
	RMB		RMB		RMB		US$
Net revenues
One-on-one offerings	835,649		1,044,769		1,365,706		196,171
Small class offerings	12,344		100,748		112,787		16,201
Total net revenues	847,993		1,145,517		1,478,493		212,372
Cost of revenues
One-on-one offerings	(293,763)		(342,927)		(386,085)		(55,458)
Small class offerings	(20,358)		(67,981)		(53,838)		(7,733)
Total cost of revenues	(314,121)		(410,908)		(439,923)		(63,191)
Gross profit
One-on-one offerings	541,886		701,842		979,621		140,713
Small class offerings	(8,014)		32,767		58,949		8,468
Total gross profit	533,872		734,609		1,038,570		149,181
Gross profit margin
One-on-one offerings	64.8	%	67.2	%	71.7	%	71.7	%
Small class offerings	(64.9)	%	32.5	%	52.3	%	52.3	%
Total gross profit margin	63.0	%	64.1	%	70.2	%	70.2	%
Sales and marketing expenses
One-on-one offerings	(619,966)		(647,314)		(738,010)		(106,009)
Small class offerings	(37,099)		(83,919)		(54,581)		(7,840)
Total sales and marketing expenses	(657,065)		(731,233)		(792,591)		(113,849)
Product development expenses
One-on-one offerings	(202,129)		(139,240)		(138,291)		(19,864)
Small class offerings	(21,073)		(45,760)		(19,214)		(2,760)
Total product development expenses	(223,202)		(185,000)		(157,505)		(22,624)
General and administrative expenses
One-on-one offerings	(213,880)		(186,983)		(178,606)		(25,655)
Small class offerings	(10,515)		(36,074)		(17,423)		(2,503)
Total general and administrative expenses	(224,395)		(223,057)		(196,029)		(28,158)
Operating expenses
One-on-one offerings	(1,035,975)		(973,537)		(1,054,907)		(151,528)
Small class offerings	(68,687)		(165,753)		(91,218)		(13,103)
Total operating expenses	(1,104,662)		(1,139,290)		(1,146,125)		(164,631)
Loss from operations
One-on-one offerings	(494,089)		(271,695)		(75,286)		(10,815)
Small class offerings	(76,701)		(132,986)		(32,269)		(4,635)
Total loss from operations	(570,790)		(404,681)		(107,555)		(15,450)

Schedule of property and equipment by geographical location

	Property and equipment
	As of December 31,
	2018	2019
	RMB	RMB
China	27,103	16,446
Philippines	8,238	3,890