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INTANGIBLE ASSETS, NET (Schedule of Estimated Annual Amortization Expenses) (Details) - Dec. 31, 2020
¥ in Thousands, $ in Thousands
CNY (¥)
USD ($)
INTANGIBLE ASSETS, NET    
2021 ¥ 15,319 $ 2,348
2022 14,691 2,251
2023 14,440 2,213
2024 14,390 2,205
2025 ¥ 14,375 $ 2,203