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Accounts receivable, net (Details 1) ¥ in Thousands, $ in Thousands	Dec. 31, 2017 USD ($)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)
Accounts receivable | $	$ 3,808		$ 4,393
ZHEJIANG TIANLAN
Accounts receivable		¥ 180,518		¥ 165,100
Current
Accounts receivable | $	1,816		1,789
30 - 59 days past due
Accounts receivable | $	1,076		1,072
60 - 89 days past due
Accounts receivable | $	288		852
Greater than 90 days past due
Accounts receivable | $	$ 628		$ 680
Within 1 year | ZHEJIANG TIANLAN
Accounts receivable		128,413		118,476
1 year – 2 years | ZHEJIANG TIANLAN
Accounts receivable		37,934		31,340
2 years – 3 years | ZHEJIANG TIANLAN
Accounts receivable		9,158		9,387
3 years – 4 years | ZHEJIANG TIANLAN
Accounts receivable		2,270		4,593
4 years – 5 years | ZHEJIANG TIANLAN
Accounts receivable		893		240
Greater than 5 years | ZHEJIANG TIANLAN
Accounts receivable		¥ 1,850		¥ 1,064

X

- Definition

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(9))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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