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Bank borrowings (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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ZHEJIANG TIANLAN |  |  |
Bank loan |  | ¥ 26,841 | ¥ 45,000
ZHEIJIANG Bank loan borrowed by the Company |  |  |
Bank loan | [1] | 21,834 | 40,000
ZHEIJIANG Bank loan borrowed by a subsidiary of the Company |  |  |
Bank loan | [2] | ¥ 5,007 | ¥ 5,000
[1] | The bank loan is denominated in Renminbi and is repayable within 1 year. The bank loan borrowed by the Company as of December 31, 2019 bears interest at fixed rates ranged from 4.57% to 6.33% (2018: 5.0025% to 6.74%) per annum. Interest paid during the year ended December 31, 2019 was approximately RMB1,991,000 (2018: RMB2,089,000 and 2017: RMB1,720,000).
[2] | The bank loan is denominated in Renminbi and is repayable within 1 year. The bank loan borrowed by a subsidiary of the Company as of December 31, 2019 bears interest at fixed rates 5.22% (2018: 5.66%) per annum and is secured by the subsidiary's office premises and leasehold improvements and land use right. Interest paid during the year ended December 31, 2019 was approximately RMB246,000 (2018: RMB278,000 and 2017: RMB272,000).

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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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