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Capital reserve | 12 Months Ended
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Dec. 31, 2022
ZHEJIANG TIANLAN |
Capital reserve |
15. | Capital reserve
Capital reserve represents capital contributions from shareholders in excess of the paid-in capital amount and capitalization of gain on disposal of subsidiaries to the shareholders in previous years.

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Namespace Prefix: | clwt_
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Balance Type: | na
Period Type: | duration

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Name: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
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Data Type: | na
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