The following table presents summary information by segment for the six months ended June 30, 2021 and 2022, respectively.


	For the six months ended June 30,
	2021	2022
	US$	US$
Reportable segment revenue:
Mining pool	413,650	450,780
Data center	11,424	3,394
Cryptocurrency mining	11,378	37,823
Others	1,553	200
Total segment and consolidated revenue	438,005	492,197
Reportable segment cost of revenue-exclusive depreciation and amortization:
Mining pool	(405,347)	(447,997)
Data center	(8,567)	(4,319)
Cryptocurrency mining	(4,821)	(13,700)
Others	(1,753)	(2,050)
Total segment and consolidated cost of revenue-exclusive depreciation and amortization	(420,488)	(468,066)
Reportable segment cost of revenue-depreciation and amortization:
Mining pool	(1,234)	(4,748)
Data center	(1,610)	(2,343)
Cryptocurrency mining	(3,845)	(14,241)
Others	(84)	—
Total segment and consolidated cost of revenue-depreciation and amortization	(6,773)	(21,332)
Total segment and consolidated cost	(427,261)	(489,398)
Reconciling items:
Operating expenses	(9,906)	(14,887)
Other operating income	46	276
Government grant	—	9
Other operating expenses	(434)	(1,515)
Net loss on disposal of cryptocurrencies	(8,634)	(2,057)
Impairment of cryptocurrency assets	(8,863)	(12,620)
Changes in fair value of derivative instrument	836	—
Impairment of property and equipment	—	(836)
Changes in fair value of contingent considerations	—	1,247
Operating loss from continuing operations	(16,211)	(27,584)
Other income, net	280	554
Interest income	37	106
Interest expense	(709)	(218)
(Loss) gain from equity method investments	(859)	151
Gain on previously held equity method investment	5,500	—
Gain from disposal of a subsidiary	126	—
Net loss from continuing operations	(11,836)	(26,991)