LEASES (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| LEASES. |
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| Schedule of supplemental balance sheet information related to operating lease |
| | | | | | | | | As of December 31, | | | 2024 | | 2025 | | | RMB | | RMB | | US$ | Operating lease right-of-use assets | | 5,937,063 | | 7,637,320 | | 1,090,065 | | | | | | | | Operating lease liabilities – current | | 2,343,387 | | 2,948,353 | | 420,815 | Operating lease liabilities – non-current | | 3,330,529 | | 4,315,808 | | 615,990 | Total operating lease liabilities | | 5,673,916 | | 7,264,161 | | 1,036,805 |
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| Schedule of the weighted average remaining lease terms and discount rates for the operating lease |
| | | | | | | | As of December 31, | | | | 2024 | | 2025 | | Weighted average remaining lease term (years) | | 1.59 | | 1.72 | | Weighted average discount rate | | 3.737 | % | 3.773 | % |
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| Schedule of components of lease cost |
| | | | | | | | | | | | | | | For the year ended | | | | | December 31, | | | Classification | | 2023 | | 2024 | | 2025 | | | | | RMB | | RMB | | RMB | | US$ | Operating lease cost | | Store rental and other operating costs | | 1,399,217 | | 2,331,919 | | 2,917,711 | | 416,441 | Variable lease cost | | Store rental and other operating costs | | 99,981 | | 122,187 | | 199,976 | | 28,542 | Total lease cost | | | | 1,499,198 | | 2,454,106 | | 3,117,687 | | 444,983 |
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| Schedule of future minimum lease liabilities under non-cancellable operating leases |
| | | | | | | RMB | | US$ | 2026 | | 2,948,353 | | 420,815 | 2027 | | 2,198,778 | | 313,829 | 2028 | | 1,364,464 | | 194,748 | 2029 | | 705,407 | | 100,682 | 2030 and thereafter | | 505,977 | | 72,217 | Less: interest | | (458,818) | | (65,486) | | | | | | Total | | 7,264,161 | | 1,036,805 |
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