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Parent Company Only Condensed Financial Information - Schedule of Condensed Balance Sheets (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2025 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
--- | --- | --- | --- | --- | ---
Current assets: |  |  |  |  |
Cash and cash equivalents | ¥ 439,731 | $ 62,881 | ¥ 592,721 | ¥ 454,536 |
Prepayment and other current assets | 139,117 | 19,892 | 154,331 |  |
Total current assets | 1,722,506 | 246,315 | 1,486,768 |  |
Non-current assets: |  |  |  |  |
Total non-current assets | 252,539 | 36,113 | 327,627 |  |
Total assets | 1,975,045 | 282,428 | 1,814,395 |  |
Current liabilities: |  |  |  |  |
Accrued liabilities and other payables | 738,045 | 105,540 | 638,660 |  |
Total current liabilities | 2,934,912 | 419,687 | 2,946,952 |  |
Non-current liabilities: |  |  |  |  |
Total non-current liabilities | 974,230 | 139,313 | 956,755 |  |
Total liabilities | 3,909,142 | 559,000 | 3,903,707 |  |
Shareholders' deficit: |  |  |  |  |
Additional paid-in capital | 4,055,956 | 579,994 | 4,043,781 |  |
Treasury stock | (175,998) | (25,167) | (210,787) |  |
Accumulated deficit | (5,761,700) | (823,914) | (5,867,042) |  |
Accumulated other comprehensive loss | (99,949) | (14,293) | (111,539) |  |
Statutory reserves | 7,576 | 1,083 | 5,549 |  |
Total shareholders' deficit | (1,934,097) | (276,572) | (2,089,312) | ¥ (2,167,064) | ¥ (1,541,845)
Total liabilities and shareholders' deficit | 1,975,045 | 282,428 | 1,814,395 |  |
NetEase Group [Member] |  |  |  |  |
Current assets: |  |  |  |  |
Amounts due from Youdao Group Companies | 321,359 | 45,954 | 79,700 |  |
Current liabilities: |  |  |  |  |
Amounts due to NetEase Group | 22,818 | 3,263 | 21,997 |  |
Non-current liabilities: |  |  |  |  |
Long-term loans from NetEase Group | 926,588 | 132,500 | 913,000 |  |
Class A ordinary shares [Member] |  |  |  |  |
Shareholders' deficit: |  |  |  |  |
Ordinary shares | 24 | 3 | 24 |  |
Class B ordinary share [Member] |  |  |  |  |
Shareholders' deficit: |  |  |  |  |
Ordinary shares | 56 | 8 | 56 |  |
Parent Company [Member] |  |  |  |  |
Current assets: |  |  |  |  |
Cash and cash equivalents | 4,542 | 649 | 9,892 |  |
Prepayment and other current assets | 69 | 10 | 27 |  |
Total current assets | 27,911 | 3,991 | 18,617 |  |
Non-current assets: |  |  |  |  |
Total non-current assets | 2,666,376 | 381,287 | 2,737,221 |  |
Total assets | 2,694,287 | 385,278 | 2,755,838 |  |
Current liabilities: |  |  |  |  |
Amounts due to NetEase Group | 2,182 | 312 | 2,414 |  |
Amounts due to Youdao Group Companies |  |  | 7,125 |  |
Accrued liabilities and other payables | 3,895 | 557 | 2,500 |  |
Total current liabilities | 6,077 | 869 | 12,039 |  |
Non-current liabilities: |  |  |  |  |
Deficit in subsidiaries and VIEs | 4,152,680 | 593,825 | 4,387,757 |  |
Long-term loans from NetEase Group | 509,588 | 72,870 | 496,000 |  |
Total non-current liabilities | 4,662,268 | 666,695 | 4,883,757 |  |
Total liabilities | 4,668,345 | 667,564 | 4,895,796 |  |
Shareholders' deficit: |  |  |  |  |
Additional paid-in capital | 4,055,956 | 579,994 | 4,043,781 |  |
Treasury stock | (175,998) | (25,167) | (210,787) |  |
Accumulated deficit | (5,761,723) | (823,914) | (5,867,042) |  |
Accumulated other comprehensive loss | (99,949) | (14,293) | (111,539) |  |
Statutory reserves | 7,576 | 1,083 | 5,549 |  |
Total shareholders' deficit | (1,974,058) | (282,286) | (2,139,958) |  |
Total liabilities and shareholders' deficit | 2,694,287 | 385,278 | 2,755,838 |  |
Parent Company [Member] | Related Party [Member] |  |  |  |  |
Current assets: |  |  |  |  |
Amounts due from Youdao Group Companies | 23,300 | 3,332 | 8,698 |  |
Non-current assets: |  |  |  |  |
Amounts due from Youdao Group Companies | 2,666,376 | 381,287 | 2,737,221 |  |
Parent Company [Member] | Class A ordinary shares [Member] |  |  |  |  |
Shareholders' deficit: |  |  |  |  |
Ordinary shares | 24 | 3 | 24 |  |
Parent Company [Member] | Class B ordinary share [Member] |  |  |  |  |
Shareholders' deficit: |  |  |  |  |
Ordinary shares | ¥ 56 | $ 8 | ¥ 56 |  |

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