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Long-term investments (Tables) | 12 Months Ended
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Dec. 31, 2023
Long-Term Investments [Abstract] |
Schedule of long-term investments |
| As of December 31,
| 2022 |  | 2023
| RMB |  | RMB
Equity method investments | 284,536 |  |  | 252,407 |
Equity securities | 69,319 |  |  | 48,580 |
Total long-term investments | 353,855 |  |  | 300,987 |
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 |
Summary of combined financial position for the investee companies as of December 31, 2022 and 2023 and the results of the operation for the years ended December 31, 2021, 2022 and 2023 is as follows:
| As of December 31,
| 2022 |  | 2023
| RMB |  | RMB
Financial position: |  |  |
Current assets | 1,216,042 |  |  | 878,519 |
Non-current assets | 999,573 |  |  | 1,093,602 |
Total assets | 2,215,615 |  |  | 1,972,121 |
Current liabilities | 942,899 |  |  | 1,043,703 |
Non-current liabilities | 1,056,274 |  |  | 1,146,673 |
Total liabilities | 1,999,173 |  |  | 2,190,376 |
Shareholders’ equity (deficit) | 216,442 |  |  | (218,255) |
Total liabilities and shareholders’ equity (deficit) | 2,215,615 |  |  | 1,972,121 |
| Year ended December 31,
| 2021 | 2022 |  | 2023
| RMB | RMB |  | RMB
Results of operations: |  |  |  |
Total revenues | 711,800 |  | 1,134,152 |  |  | 1,290,126 |
Loss from operation | (482,095) |  | (636,240) |  |  | (795,354) |
Net loss | (392,337) |  | (641,401) |  |  | (839,052) |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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