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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Other operating income, net (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenue recognition |  |  |
Net (gain) loss on disposal of property, plant and equipment | $ (5,342) | $ (4,259) | $ 83
Net (gain) loss on disposal of solar power system | 244 |  | (10,091)
Weather-related project damages |  |  | 1,408
Other operating income, net | (84,339) | (63,802) | (47,068)
Other current liabilities |  |  |
Revenue recognition |  |  |
Government grants, non current | 159,991 |  |
Government grants |  |  |
Revenue recognition |  |  |
Other operating income, net | $ (79,241) | $ (59,543) | $ (38,468)

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