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Long-term investments (Tables) | 12 Months Ended
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Dec. 31, 2022
Long-term investments. |
Schedule of long-term investments | ​
​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ |  | 2021 |  | 2022
​ | ​ | RMB | ​ | RMB
Equity method investments | ​ | 678,225 | ​ | 420,445
Equity securities | ​ | 675,824 | ​ | 69,319
Total long-term investments | ​ | 1,354,049 | ​ | 489,764
Schedule of combined financial information for investee companies | ​
​ | ​ | ​
​ | ​ | ​
​ |  | Year Ended December 31,
​ | ​ | 2022
​ | ​ | RMB
Fair value of the consideration received |  | —
Add: Fair value of retained equity interest in Suzhou Photon-Matrix |  | 64,000
Add: Carrying amount of redeemable noncontrolling interest |  | 40,750
Less: Carrying amount of non-redeemable noncontrolling interest |  | (7,178)
Less: Carrying amount of Suzhou Photon-Matrix’s net assets |  | (25,598)
Gains on deconsolidation of Suzhou Photon-Matrix |  | 71,974
​
​ | ​ | ​ | ​ | ​
​ |  | As of December 31,
​ | ​ | 2021 |  | 2022
​ |  | RMB | ​ | RMB
Financial position: | ​ | ​ | ​ | ​
Current assets |  | 1,464,896 | ​ | 1,924,404
Non-current assets |  | 1,259,714 | ​ | 1,044,375
Total assets |  | 2,724,610 | ​ | 2,968,779
Current liabilities |  | 675,927 | ​ | 1,411,045
Non-current liabilities |  | 956,934 | ​ | 1,069,822
Total liabilities |  | 1,632,861 | ​ | 2,480,867
Shareholders’ equity |  | 1,091,749 | ​ | 487,912
Total liabilities and shareholders’ deficit |  | 2,724,610 | ​ | 2,968,779
​
​ | ​ | ​ | ​ | ​
​ |  | Year ended December 31,
​ | ​ | 2021 |  | 2022
​ | ​ | RMB | ​ | RMB
Results of operations: |  | ​ | ​ |
Total revenues |  | 711,800 | ​ | 1,141,490
Loss from operation |  | (500,388) | ​ | (804,411)
Net loss |  | (389,593) | ​ | (772,328)

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