The Group has operating leases arrangements for their regional processing centers, frontline fulfillment stations, office space, vehicles and equipment.

A summary of supplemental information related to operating leases as of December 31, 2020 and 2021 is as follows:


	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
	(in thousands)
Operating lease right-of-use assets		1,503,222			2,245,571			352,379

Operating lease liabilities, current		594,787			969,494			152,135
Operating lease liabilities, non-current		871,685			1,244,096			195,226

Total operating lease liabilities		1,466,472			2,213,590			347,361

Weighted average remaining lease term		2.85 years			2.79 years			2.79 years

Weighted average discount rate		6.4	%		6.8	%		6.8	%

A summary of lease cost recognized in the Group’s consolidated statements of comprehensive loss and supplemental cash flow information related to operating leases is as follows:


	For the years ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
	(in thousands)
Operating lease cost		165,733		475,064		953,325		149,597
Short-term lease cost		1,859		7,391		12,227		1,919
Variable lease cost		—		—		8,247		1,294

Total		167,592		482,455		973,799		152,810

Cash paid for operating leases		168,787		500,458		1,002,511		157,316

Right-of-use assets obtained in exchange for operating lease liabilities		499,615		1,489,367		1,671,666		262,321

A summary of maturity of operating lease liabilities under the Group’s

non-cancelable

operating leases as of December 31, 2021 is as follows:


	As of December 31, 2021
	RMB			US$
	(in thousands)
2022		1,080,579			169,566
2023		711,673			111,677
2024		379,318			59,523
2025		188,455			29,573
2026		59,163			9,284
Thereafter		1,067			168

Total future lease payments		2,420,255			379,791

Less: imputed interest		(206,665	)		(32,430	)

Total operating lease liabilities		2,213,590			347,361

As of December 31, 2021, the Group entered into new operating leases primarily for regional processing centers and frontline fulfillment stations of

RMB27.8 million, which have not yet commenced. The related right of use assets and lease liabilities of RMB24.2 million and RMB22.5 million, respectively, will be recorded in the consolidated balance sheets upon commencement of the leases.