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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Noon buying rate | 6.8755 |  |  |  |  |  | 6.8755 |
Interest and other costs relating to construction capitalized | ¥ 55,485 | $ 8,070 |  | $ 38,533 |  | $ 1,956 |  |
Impairment on long-lived assets | 5,433 | 790 | ¥ 28,600 |  | ¥ 61,124 |  |  |
Taxes and related surcharges |  |  | 2,439 |  | 5,854 |  |  |
Advertising expenses | 2,429 | $ 353 | 2,910 |  | 7,378 |  |  |
Deferred Tax Liabilities, Loss Transfer | ¥ 0 |  | 5,632 |  |  |  | $ 0 | $ 819
Description of Items to be Classified as Cash Equivalents | 90 days | 90 days |  |  |  |  |  |
Interest Costs Incurred | ¥ 101,717 | $ 14,793 | ¥ 128,492 |  | ¥ 91,283 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Leases and management service arrangements, term | 5 years | 5 years |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Leases and management service arrangements, term | 20 years | 20 years |  |  |  |  |  |
Prepaid Land Lease Rights [Member] |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Leases and management service arrangements, term | 50 years | 50 years |  |  |  |  |  |

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