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NOTES RECEIVABLE (Details) - Dec. 31, 2019 ¥ in Thousands, $ in Thousands | USD ($) | CNY (¥)
--- | --- | ---
Notes receivable |  |
Notes receivable | $ 3,388 | ¥ 23,587
Pledged as collateral | Borrowings |  |
Notes receivable |  |
Notes receivable |  | 23,587
Pledged as collateral | Notes receivable |  |
Notes receivable |  |
Notes receivable |  | ¥ 14,264

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