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Inventories (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CNY (¥)
Raw materials | $ $ 96   $ 132  
Work in progress | $ 21   48  
Finished goods | $ 710   748  
Inventory, net | $ $ 401   $ 496  
ZHEJIANG TIANLAN        
Raw materials | ¥   ¥ 11,963   ¥ 4,741
Work in progress | ¥   0   6,452
Finished goods | ¥   0   3,924
Inventory, net | ¥   ¥ 11,963   ¥ 15,117