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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Liabilities from Quality Assurance Program) (Details) - Guarantee obligations - CNY (¥) ¥ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Liabilities from quality assurance program
Cost incurred due to organized fraud incident associated to FastTrack loan products	¥ 81,300
Movement of liability from risk reserve fund guarantee:
Beginning balance		¥ 546,332
Provision at the inception of new loans		1,598,238
Provision for fraud incident		81,263
Net Payment		(754,833)
Ending balance		1,471,000
Maximum exposure		¥ 1,114,805	¥ 453,230

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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-Publisher FASB
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-Topic 460
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-Section 50
-Paragraph 4
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Amount of loss contingency liability.

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-Section 50
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Amount of cash outflow reducing loss contingency liability.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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Represents provision for fraud incident.

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