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Parent Company Only Condensed Financial Information - Condensed balance sheets (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
--- | --- | --- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | ¥ 10,249,382 | $ 1,404,160 | ¥ 7,191,821 | ¥ 10,172,584
Prepayments and other current assets | 1,148,111 | 157,291 | 1,272,788 |
Short-term investments | 2,706,535 | 370,794 | 2,653,065 |
Long-term investments, net | 3,911,592 | 535,886 | 4,366,632 |
Investments in subsidiaries and net assets of VIEs and VIEs' subsidiaries | 1,834,070 |  | 1,862,739 |
Total assets | 32,698,500 | 4,479,677 | 33,159,067 |
Deferred revenue | 3,802,307 | 520,914 | 2,954,088 |
Accrued liabilities and other payables | 2,554,281 | 349,935 | 1,780,623 |
Other long-term payable | 567,631 | 77,765 | 650,459 |
Total liabilities | 18,594,587 | 2,547,447 | 18,754,800 |
Total Bilibili Inc's shareholders' equity | 14,108,397 | 1,932,844 | 14,391,900 |
Total liabilities and shareholders' equity | 32,698,500 | $ 4,479,677 | 33,159,067 |
Related Party [Member] |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Amounts due from Group companies | 786,677 |  | 790,574 |
Parent Company [Member] |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Cash and cash equivalents | 10,721 |  | 106,498 |
Prepayments and other current assets | 132,745 |  | 39,941 |
Short-term investments | 445,470 |  | 625,474 |
Long-term investments, net | 758,348 |  | 772,559 |
Investments in subsidiaries and net assets of VIEs and VIEs' subsidiaries | 345,248 |  |  |
Total assets | 17,380,987 |  | 20,757,887 |
Short-term loans and current portion of long-term debt | 31,657 |  | 6,053,767 |
Deferred revenue | 9,836 |  | 9,284 |
Accrued liabilities and other payables | 64,151 |  | 93,713 |
Other long-term payable | 3,166,946 |  | 15,931 |
Deficit in subsidiaries and net loss of VIEs and VIEs' subsidiaries |  |  | 193,292 |
Total liabilities | 3,272,590 |  | 6,365,987 |
Total Bilibili Inc's shareholders' equity | 14,108,397 |  | 14,391,900 |
Total liabilities and shareholders' equity | 17,380,987 |  | 20,757,887 |
Parent Company [Member] | Related Party [Member] |  |  |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |  |  |
Amounts due from Group companies | ¥ 15,688,455 |  | ¥ 19,213,415 |

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