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Land use right, net (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
ZHEJIANG TIANLAN |  |  |
Land use right | ¥ 7,361 | ¥ 7,361 |
Less: Accumulated amortisation | (1,763) | (1,614) |
Net | 5,598 | 5,747 |
Amortisation expense | 149 | 149 | ¥ 149
ZHEJIANG JIAHUAN |  |  |
Land use right | 7,987 | 7,987 |
Less: Accumulated amortisation | (1,862) | (1,699) |
Net | 6,125 | 6,288 |
Amortisation expense | ¥ 163 | ¥ 163 | ¥ 163

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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date of an intangible asset that arises from a contractual arrangement with a third party (not including franchise rights and license agreements). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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