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7. Prepayments and other current assets (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2014 | Dec. 31, 2013
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ZHEJIANG TIANLAN |  |
Contracts costs incurred plus estimated earnings | ¥ 207,632 | ¥ 548,026
Less: Progress billings | (53,723) | (424,397)
Cost and estimated earnings in excess of billings | 153,909 | 123,629
ZHEJIANG JIAHUAN |  |
Prepayments and other receivables | 11,333 | 5,141
Deposits | 3,067 | 3,185
Prepayments and other current assets | ¥ 14,400 | ¥ 8,326

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