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Intangible assets, net (Tables) - ZHEJIANG TIANLAN | 12 Months Ended
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Dec. 31, 2020
Intangible assets, net |
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |
Amortizable intangible assets |  |  |  |  |  |
Gross carrying amount |  |  |  |  |  |
Patents |  |  | 3,750 |  |  |  | 2,400 |
Others |  |  | 165 |  |  |  | 165 |
|  |  | 3,915 |  |  |  | 2,565 |
Less: Accumulated amortization |  |  | (1,795 | ) |  |  | (1,638 | )
Net carrying amount |  |  | 2,120 |  |  |  | 927 |
Amortization expense | At December 31, 2020, estimated future intangible assets amortization expense for the each of the next five years and thereafter was as follows:
|  | Future amortization expense |
|  | RMB’000 |
2021 |  |  | 142 |
2022 |  |  | 142 |
2023 |  |  | 142 |
2024 |  |  | 142 |
2025 |  |  | 142 |
Thereafter |  |  | 1,410 |
Total |  |  | 2,120 |
At December 31, 2019, estimated future intangible assets 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 Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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