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Deferred Government Grants (Narrative) (Details) (CNY) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2014
Deferred Government Grants 1	150

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- Definition

Deferred Government Grants 1

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Name:	cbak_DeferredGovernmentGrantsZeroTwoThreeEightZeroTwoEightFiveTwoRRkzThreebSbTwohZerow
Namespace Prefix:	cbak_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration