Convertible Redeemable Preferred Shares (Tables)

12 Months Ended

Dec. 31, 2021

Temporary Equity Disclosure [Abstract]

Summary of Changes in Carrying Amount of Convertible Redeemable Preferred Shares

The following table summarizes changes in the carrying amount of the convertible redeemable preferred shares for the years ended December 31, 2019, 2020 and 2021:

	Series A Convertible redeemable preferred shares (par value US$0.001)						Series B Convertible redeemable preferred shares (par value US$0.001)						Series C Convertible redeemable preferred shares (par value US$0.001)						Series D Convertible redeemable preferred shares (par value US$0.001)						Series E Convertible redeemable preferred shares (par value US$0.001)						Series F Convertible redeemable preferred shares (par value US$0.001)						Total
	Number of shares			Amount			Number of shares			Amount			Number of shares			Amount			Number of shares			Amount			Number of shares			Amount			Number of shares			Amount			Number of shares			Amount
Balance as of January 1, 2019		9,497,040			238,504			7,586,836			201,588			33,320,256			1,041,923			10,068,160			1,010,041			—			—			—			—			60,472,292			2,492,056
Issuance		—			—			—			—			—			—			—			—			30,021,942			3,693,326			—			—			30,021,942			3,693,326
Collection of Subscription    Receivables		—			—			—			—			—			16,697			—			—			—			—			—			—			—			16,697
Accretion		—			123,459			—			94,078			—			335,372			—			(4,189	)		—			329,279			—			—			—			877,999
Balance as of December 31, 2019		9,497,040			361,963			7,586,836			295,666			33,320,256			1,393,992			10,068,160			1,005,852			30,021,942			4,022,605			—			—			90,494,234			7,080,078
Issuance		—			—			—			—			—			—			—			—			4,203,072			495,318			—			—			4,203,072			495,318
Accretion		—			83,312			—			65,967			—			311,443			—			147,741			—			696,035			—			—			—			1,304,498
Balance as of December 31, 2020		9,497,040			445,275			7,586,836			361,633			33,320,256			1,705,435			10,068,160			1,153,593			34,225,014			5,213,958			—			—			94,697,306			8,879,894
Issuance		—			—			—			—		—			—				—			—			1,953,652			241,341			9,777,383			1,179,326			11,731,035			1,420,667
Issuance upon conversion of    convertible bonds		—			—			—			—			10,906,031			192,122			—			—			—			—			—			—			10,906,031			192,122
Accretion		—			21,898			—			17,207			—			246,015			—			37,083			—			186,424			—			—			—			508,627
Convert to Class A Ordinary    shares		(9,497,040	)		(467,173	)		(7,586,836	)		(378,840	)		(30,284,935	)		(1,467,859	)		(7,952,405	)		(940,464	)		(5,876,520	)		(916,388	)		(9,056,944	)		(1,092,428	)		(70,254,680	)		(5,263,152	)
Convert to Class B Ordinary    shares		—			—			—			—			(13,941,352	)		(675,713	)		(2,115,755	)		(250,212	)		(30,302,146	)		(4,725,335	)		(720,439	)		(86,898	)		(47,079,692	)		(5,738,158	)
Balance as of December 31,    2021		—			—			—			—			—			—			—			—			—			—			—			—			—			—
Authorized as of December 31,    2019		9,497,040						7,586,836						33,320,256						10,068,160						30,021,942
Authorized as of December 31,    2020		9,497,040						7,586,836						44,226,287						10,068,160						36,122,625

Summary of Issuance of Convertible Redeemable Preferred Shares

The following table summarizes the issuance of convertible redeemable preferred shares up to December 31, 2021:

Series	Issuance date	Share Issued		Issue Price per Share	Proceeds from Issuance
A, B, C-1, C-2	August 31, 2012 ~ November 11, 2016		44,887,552	US$0.21~US$2.65	US$63,902
C-3	June 26, 2018		1,884,512	US$2.65	US$5,000
C-3	December 7, 2018		7,819,871	US$2.65	RMB138,688
C-3	February 8, 2021 ~ May 25, 2021		10,906,031	US$2.65	RMB192,122
D	July 5, 2018		2,115,755	US$10.83	US$22,917
D	July 5, 2018		7,952,405	US$12.74	US$101,340
E	June 3 ~ September 16, 2019		2,521,844	US$17.84	US$45,000
E	June 3, 2019		27,500,098	US$0.70	US$20,115
E+	September 4 ~ September 14, 2020		4,203,072	US$17.84	US$75,000
E+	February 8, 2021 ~ May 25, 2021		1,953,652	US$17.84	RMB241,341
F	April 16, 2021 ~ May 25, 2021		9,777,383	US$19.43	US$168,000