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PRINCIPAL ACCOUNTING POLICIES - Additional Information (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2025 CNY (¥) item customer segment | Dec. 31, 2025 USD ($) item customer segment | Dec. 31, 2024 CNY (¥) segment | Dec. 31, 2023 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Cash and cash equivalent primarily of bank deposits | $ |  |  |  |  | $ 6,300,000 | $ 600,000
Cash and cash equivalents | ¥ 58,489,000 |  | ¥ 10,911,000 |  | 8,364,000 |
Allowances for credit losses | 40,773,000 |  | ¥ 39,577,000 |  | 5,700,000 |
License authorization period |  |  | 5 years |  |  | 5 years
Purchase of Intangible assets | 10,510,000 | $ 1,503,000 |  |  |  |
Advertising expenses | 400,000 | 60,000.00 | ¥ 0 | ¥ 200,000 |  |
Marketing expenses | 33,600,000 | $ 4,900,000 | 200,000 | 1,500,000 |  |
Unrestricted government subsidies from local government | ¥ 0 |  | ¥ 30,000.00 | 0 |  |
Number of reportable segments | segment | 2 | 2 | 2 |  |  |
One supplier | Supplier | Cost of goods and service benchmark |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Number of suppliers | item | 1 | 1 |  |  |  |
Concentration risk percentage | 12.00% | 12.00% |  |  |  |
Related party |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Accounts receivable | ¥ 6,284,000 |  |  |  | 899,000 |
Accounts receivable, net of allowance for credit losses | ¥ 0 |  |  |  |  |
Related party | Customer one | Customer | Accounts receivable |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Number of customers | customer | 1 | 1 |  |  |  |
Concentration risk percentage | 62.00% | 62.00% |  |  |  |
Related party | One supplier | Supplier | Accounts payable |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Number of suppliers | item | 1 | 1 |  |  |  |
Concentration risk percentage | 19.00% | 19.00% |  |  |  |
Nonrelated party |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Accounts receivable | ¥ 3,782,000 |  |  |  | 540,000 |
Accounts receivable, net of allowance for credit losses | 505,000 |  | ¥ 505,000 |  | $ 72,000 |
Allowance for credit losses | 7,800,000 | $ 1,100,000 | 0 | 17,800,000 |  |
Allowance for credit losses written off | ¥ 7,800,000 | $ 1,100,000 | 800,000 | 100,000 |  |
Nonrelated party | Two customers | Customer | Accounts receivable |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Number of customers | customer | 2 | 2 |  |  |  |
Nonrelated party | Customer one | Customer | Accounts receivable |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Concentration risk percentage | 23.00% | 23.00% |  |  |  |
Nonrelated party | Customer two | Customer | Accounts receivable |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Concentration risk percentage | 13.00% | 13.00% |  |  |  |
Nonrelated party | One supplier | Supplier | Accounts payable |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Number of suppliers | item | 1 | 1 |  |  |  |
Concentration risk percentage | 36.00% | 36.00% |  |  |  |
Game Licenses |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Initial cost of the licenses | ¥ 2,800,000 |  |  |  |  |
Net of recoverable taxes | 200,000 |  |  |  |  |
Purchase of Intangible assets | 3,000,000 | $ 400,000 |  |  |  |
AI software- AI-driven User Acquisition And Platform Distribution Hub [Member] |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Purchase of Intangible assets | 7,500,000 | 1,100,000 |  |  |  |
Total consideration | 14,500,000 | 2,100,000 |  |  |  |
Consideration payable | ¥ 7,000,000 | $ 1,000,000 |  |  |  |
Minimum |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Share-based awards vesting period | 1 year | 1 year |  |  |  |
Maximum |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Share-based awards vesting period | 4 years | 4 years |  |  |  |
Maximum | Game Licenses |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
License authorization period | 5 years |  |  |  | 5 years |
Filecoin | Other Nonoperating Income (Expense) |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Net income (loss) attributable to the group under crypto asset | ¥ 300,000 | $ 40,000.00 | 2,000,000 | ¥ 1,500,000 |  |
Greater China |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Cash, FDIC insured amount | 500,000 |  |  |  | $ 71,499 |
Total unprotected cash held in bank | 52,700,000 |  | 4,100,000 |  | 7,500,000 |
United States |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Cash, FDIC insured amount | 1,700,000 |  |  |  | 250,000 |
Total unprotected cash held in bank | 0 |  | 0 |  |  |
Controlled by PRC State Administration for Foreign Exchange, under authority of People's Bank of China |  |  |  |  |  |
PRINCIPAL ACCOUNTING POLICIES |  |  |  |  |  |
Cash and cash equivalents | ¥ 13,700,000 |  | ¥ 6,600,000 |  | $ 2,000,000 |

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