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INVESTMENTS IN CONSOLIDATED SUBSIDIARIES - Shanghai Zhongxinshun (Details) ¥ in Millions | Sep. 20, 2025 CNY (¥) installment shares | Dec. 31, 2025 CNY (¥) | Sep. 22, 2025 item | Jan. 31, 2025 CNY (¥)
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Shanghai Zhongxinshun Network Technology Co., Ltd. ("Zhongxinshun") |  |  |  |
Schedule of Investments in Consolidated Subsidiaries [Line Items] |  |  |  |
Contingent consideration | ¥ 41.3 |  |  |
Cash earn-outs | ¥ 68.9 |  |  |
Number of installments | installment | 3 |  |  |
Threshold net profit after tax | ¥ 50.0 |  |  |
Goodwill |  |  |  | ¥ 0.0
Contingent cash earn outs liability |  | ¥ 0.0 |  |
Class A ordinary shares | Shanghai Zhongxinshun Network Technology Co., Ltd. ("Zhongxinshun") |  |  |  |
Schedule of Investments in Consolidated Subsidiaries [Line Items] |  |  |  |
Number of shares issuable | shares | 18,579,000 |  |  |
Value of shares issuable | ¥ 4.6 |  |  |
Shanghai Zhongxinshun Network Technology Co., Ltd. ("Zhongxinshun") |  |  |  |
Schedule of Investments in Consolidated Subsidiaries [Line Items] |  |  |  |
Percentage of interest owned |  |  | 51.00% |
Number of board members appointed by parent | item |  |  | 3 |
Total number of board members | item |  |  | 5 |

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