PROPERTY AND EQUIPMENT, NET

12 Months Ended

Dec. 31, 2021

9.	PROPERTY AND EQUIPMENT, NET

	As of December 31,
	2020 $			2021 $

Computers		522,108			883,249
Office equipment, furniture and fittings		31,613			43,060
Leasehold improvements		162,032			252,778
Transportation assets		6,184			208,701
Warehouse equipment		7,296			20,796
Land		22,708			196,421
Building		2,093			1,956
Construction-in-progress		973			22,952
		755,007			1,629,913
Less: accumulated depreciation		(368,606	)		(599,950	)
		386,401			1,029,963

Depreciation expenses recognized for each of the years ended December 31, 2019, 2020 and 2021 were included in the following captions:

	Year ended December 31,
	2019 $		2020 $		2021 $

Cost of revenue		80,245		118,691		180,140
Sales and marketing expenses		3,200		4,965		7,960
General and administrative expenses		31,282		41,384		64,187
Research and development expenses		2,056		4,027		8,395
		116,783		169,067		260,682

No impairment loss had been recognized during the years ended December 31, 2019, 2020 and 2021, respectively.