Investments in affiliates (Tables)

12 Months Ended

Dec. 31, 2021

Investments in affiliates

Investments in affiliates

	December 31,
	2021			2020
Zhejiang Tianlan Environmental Protection Technology Co. Ltd.
Interest held		19.4	%		19.4	%
	US$’000			US$’000
Long-term investment, at cost, less impairment		5,540			5,540
Share of undistributed profits		2,537			2,544
		8,077			8,084

Summary of the financial information of the affiliates

	December 31,
	2021			2020
Balance Sheet:	US$’000			US$’000
Current assets		42,510			44,918
Non-current assets		15,172			15,258
Total assets		57,682			60,176
Total liabilities		(27,376	)		(30,889	)
Total shareholders’ equity		30,306			29,287

	Year ended December 31,
	2021		2020
Operating results:	US$’000		US$’000
Net sales		51,280		43,933
Operating income		1,997		2,214
Net income		2,105		1,946