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Other income, net (Tables) | 12 Months Ended
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Dec. 31, 2021
Other income, net |
Schedule of other income, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31,
(In thousands) |  | 2019 |  | 2020 |  | 2021
Government subsidy income |  | 2,061 |  | 2,287 |  | 3,206
Investment income from short-term investments |  | 4,020 |  | 2,943 |  | 2,486
Net unrealized gains arising from long-term investments |  | 10,907 |  | 794 |  | —
Investment income on disposal of long-term investments |  | 579 |  | 214 |  | 42
Impairment of long-term investments |  | (19,831) |  | (794) |  | —
Exchange loss, net |  | (402) |  | (2,948) |  | (1,205)
Settlement income | ​ | 1,531 | ​ | — | ​ | —
Gains from disposal of LinkToken program |  | 6,630 |  | — |  | —
VAT deduction | ​ | 427 | ​ | 1,361 | ​ | 818
Others |  | (61) |  | 880 |  | (669)
Total |  | 5,861 |  | 4,737 |  | 4,678

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