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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2020 USD ($) | Jan. 01, 2020 CNY (¥) | Jan. 01, 2018 CNY (¥) | Dec. 31, 2017 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Noon buying rate | 6.525 |  |  |  | 6.525 |  |  |
Conversion from noon buying rate to per share value | $ / shares |  | $ 1.00 |  |  |  |  |  |
Description of Items to be Classified as Cash Equivalents | 90 | 90 |  |  |  |  |  |
Net loss from continuing operations | ¥ (404,029) | $ (61,922) | ¥ (352,092) | ¥ (259,297) |  |  |  |
Net cash (used in ) generated from operating activities | (229,766) | (35,212) | (195,347) | (38,591) |  |  |  |
Capital Contributed | $ |  |  |  |  |  |  |  | $ 10,000
Interest Costs Incurred | 148,642 | 22,780 | 110,319 | 101,717 |  |  |  |
Interest and other costs relating to construction capitalized | 67,283 | 10,312 | 81,619 | 55,485 |  |  |  |
Impairment on long-lived assets | 8,500 | 1,303 | 76,089 | ¥ 5,433 |  |  |  |
Deferred Tax Liabilities, Loss Transfer | 0 |  | 9,346 |  | $ 0 |  |  |
Cash and cash equivalents | 334,264 |  | 74,307 |  | 51,229 |  |  |
Working capital | 163,881 |  |  |  | 25,114 |  |  |
Accumulated deficit | (2,456,649) |  | ¥ (1,785,517) |  | $ (376,498) |  |  |
Capital injection from several investors | 400,000 | 61,304 |  |  |  |  |  |
Cash inflows from convertible bonds | 97,875 | 15,000 |  |  |  |  |  |
Cash inflows from credit facilities and loans | ¥ 418,366 | $ 64,118 |  |  |  |  |  |
ASU 2016-13 |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  | ¥ 1,223 |  |
Minimum |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessor, Sales-type Lease, Term of Contract | 5 years |  |  |  | 5 years |  |  |
Maximum |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessor, Sales-type Lease, Term of Contract | 20 years |  |  |  | 20 years |  |  |
Offices and facility under leases | Minimum |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract | 1 year |  |  |  | 1 year |  |  |
Lessee, Finance Lease, Term of Contract | 1 year |  |  |  | 1 year |  |  |
Offices and facility under leases | Maximum |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessee, Finance Lease, Term of Contract | 20 years |  |  |  | 20 years |  |  |
Land use rights under leases |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract | 50 years |  |  |  | 50 years |  |  |
Lessee, Finance Lease, Term of Contract | 50 years |  |  |  | 50 years |  |  |
Equipment leased to others | Minimum |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessor, Sales-type Lease, Term of Contract | 5 years |  |  |  | 5 years |  |  |
Equipment leased to others | Maximum |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Lessor, Sales-type Lease, Term of Contract | 20 years |  |  |  | 20 years |  |  |
Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |  |  |  |  |  |
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  |  |  |  | ¥ 5,600 |

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