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Intangible assets, net | 12 Months Ended
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Dec. 31, 2019
ZHEJIANG TIANLAN |
Intangible assets, net |
|  | December 31, |
|  | 2019 |  |  | 2018 |
|  | RMB’000 |  |  | RMB’000 |
Amortizable intangible assets |  |  |  |  |  |
Gross carrying amount |  |  |  |  |  |
Patents |  |  | 2,400 |  |  |  | 2,400 |
Others |  |  | 165 |  |  |  | 575 |
|  |  | 2,565 |  |  |  | 2,975 |
Less: Accumulated amortization |  |  | (1,638 | ) |  |  | (1,896 | )
Net carrying amount |  |  | 927 |  |  |  | 1,079 |
|  | Year ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | RMB’000 |  |  | RMB’000 |  |  | RMB’000 |
Amortization expense |  |  | 152 |  |  |  | 152 |  |  |  | 152 |
At December 31, 2019, estimated future intangible asset amortization expense for the each of the next five years and thereafter was as follows:
|  | Future amortization expense |
|  | RMB’000 |
2020 |  |  | 152 |
2021 |  |  | 152 |
2022 |  |  | 152 |
2023 |  |  | 152 |
2024 |  |  | 152 |
Thereafter |  |  | 167 |
Total |  |  | 927 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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