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Prepayments and other current assets (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 CNY (¥)
--- | --- | --- | --- | ---
Cost and estimated earnings in excess of billings | $ | $ 194 |  | $ 343 |
Deposits | $ | 85 |  | 70 |
Prepayments | $ | 457 |  | 221 |
Other receivables | $ | 104 |  | 156 |
Other tax recoverable | $ | 2 |  | 25 |
Prepayments and other current assets | $ | $ 860 |  | $ 815 |
ZHEJIANG TIANLAN |  |  |  |
Contracts costs incurred plus estimated earnings |  | ¥ 330,322 |  | ¥ 389,534
Less: Progress billings |  | (211,066) |  | (318,748)
Cost and estimated earnings in excess of billings |  | 119,256 |  | 70,786
Prepayments |  | 19,606 |  | 24,100
Other receivables |  | 10,775 |  | 14,851
Other current assets |  | 0 |  | 1,320
Prepayments and other current assets |  | 149,637 |  | 111,057
ZHEJIANG JIAHUAN |  |  |  |
Prepayments and other receivables |  | 8,026 |  | 11,994
Deposits |  | 6,264 |  | 3,448
Prepayments and other current assets |  | ¥ 14,290 |  | ¥ 15,442

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