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Bank borrowings (Details) ¥ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | ---
Bank loan | $ |  | $ 88,000 |  | $ 92,000
ZHEJIANG TIANLAN |  |  |  |
Bank loan | ¥ 13,518 |  | ¥ 20,029 |
ZHEJIANG TIANLAN | Bank Loan Borrowed by the Company |  |  |  |
Bank loan | 8,511 |  | 10,014 |
ZHEJIANG TIANLAN | Bank Loan Borrowed by Subsidiaries of the Company |  |  |  |
Bank loan | ¥ 5,007 |  | ¥ 10,015 |

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- Definition Amount of short-term bank loan secured by broker-dealer customer's security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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