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Property, plant and equipment, net (Tables) | 12 Months Ended
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Dec. 31, 2021
Property, plant and equipment |
|  | December 31, |
|  | 2021 |  |  | 2020 |
|  | US$’000 |  |  | US$’000 |
Office premises* |  |  | 673 |  |  |  | 673 |
Leasehold improvements |  |  | 125 |  |  |  | 157 |
Furniture, fixtures and office equipment |  |  | 439 |  |  |  | 557 |
Motor vehicles |  |  | 175 |  |  |  | 175 |
Testing equipment |  |  | 37 |  |  |  | 37 |
|  |  | 1,449 |  |  |  | 1,599 |
Less: Accumulated depreciation |  |  | (1,234 | ) |  |  | (1,340 | )
|  |  | 215 |  |  |  | 259 |
Depreciation charge |
|  | Year ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | US$’000 |  |  | US$’000 |  |  | US$’000 |
Depreciation charge |  |  | 38 |  |  |  | 49 |  |  |  | 69 |
ZHEJIANG TIANLAN |
Property, plant and equipment |
|  | December 31, |
|  | 2021 |  |  | 2020 |
|  | RMB’000 |  |  | RMB’000 |
Building and leasehold improvements |  |  | 167,874 |  |  |  | 167,874 |
Furniture, fixtures and office equipment |  |  | 3,694 |  |  |  | 3,658 |
Motor vehicles |  |  | 4,647 |  |  |  | 4,808 |
Plant and machineries |  |  | 10,097 |  |  |  | 9,399 |
Total |  |  | 186,312 |  |  |  | 185,739 |
Less: Accumulated depreciation and amortization |  |  | (76,008 | ) |  |  | (70,241 | )
Accumulated impairment losses |  |  | (36,241 | ) |  |  | (36,241 | )
Total |  |  | (112,249 | ) |  |  | (106,482 | )
Net |  |  | 74,063 |  |  |  | 79,257 |
Depreciation charge |
|  | Year ended December 31,
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |  |  | RMB’000 |
Depreciation charge |  |  | 6,466 |  |  |  | 6,359 |  |  |  | 6,556 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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