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Contract assets and liabilities (Tables) | 12 Months Ended
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Dec. 31, 2020
Contract assets and liabilities | Contract assets consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
|  | US$’000 |  |  | US$’000 |
Unbilled revenue |  |  | 202 |  |  |  | 441 |
Contract liabilities consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
|  | US$’000 |  |  | US$’000 |
Deferred revenue |  |  | 1,063 |  |  |  | 869 |
The following table provides information about contract assets and contract liabilities from contracts with customers:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | US$’000 |  |  | US$’000 |
Contract assets |  |  | 202 |  |  |  | 441 |
Contract liabilities |  |  | (1,063 | ) |  |  | (869 | )
Net contract liabilities |  |  | (861 | ) |  |  | (428 | )
Net (liability) / asset position for contracts in process | The net liabilities position for contracts in process consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
|  | US$’000 |  |  | US$’000 |
Cost and estimated earnings on uncompleted contracts |  |  | 1,904 |  |  |  | 5,150 |
Less: billings to date |  |  | (2,765 | ) |  |  | (5,578 | )
|  |  | (861 | ) |  |  | (428 | )
The net liabilities position for contracts in process is included within the contract asset and contract liability in the accompanying consolidated balance sheets as follows at December 31:
|  | 2020 |  |  | 2019 |
|  | US$’000 |  |  | US$’000 |
Unbilled revenue |  |  | 202 |  |  |  | 441 |
Deferred revenue |  |  | (1,063 | ) |  |  | (869 | )
|  |  | (861 | ) |  |  | (428 | )
ZHEJIANG TIANLAN |
Contract assets and liabilities | Contract assets consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |
Unbilled revenue |  |  | 94,494 |  |  |  | 80,961 |
Contract liabilities consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |
Deferred revenue |  |  | 47,135 |  |  |  | 55,898 |
The following table provides information about contract assets and contract liabilities from contracts with customers at December 31:
|  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |
Contract assets |  |  | 94,494 |  |  |  | 80,961 |
Contract liabilities |  |  | (47,135 | ) |  |  | (55,898 | )
Net contract assets |  |  | 47,359 |  |  |  | 25,063 |
Net (liability) / asset position for contracts in process |
|  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |
Costs and estimated earnings on uncompleted contracts |  |  | 406,064 |  |  |  | 433,195 |
Less: billings to date |  |  | (358,705 | ) |  |  | (408,132 | )
|  |  | 47,359 |  |  |  | 25,063 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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