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PROPERTY, PLANT AND EQUIPMENT | 12 Months Ended
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Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [abstract] |
PROPERTY, PLANT AND EQUIPMENT |
| 6. | PROPERTY, PLANT AND EQUIPMENT
|  | Buildings |  |  | Mining structures and mining rights |  |  | Machinery and equipment |  |  | Motor vehicles |  |  | Construction in progress |  |  | Total |
|  | CNY |  |  | CNY |  |  | CNY |  |  | CNY |  |  | CNY |  |  | CNY |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At January 1, 2016 |  |  | 22,996 |  |  |  | 33,921 |  |  |  | 7,648 |  |  |  | 7,319 |  |  |  | 34,276 |  |  |  | 106,160 |
Additions |  |  | — |  |  |  | — |  |  |  | 3 |  |  |  | — |  |  |  | 5,020 |  |  |  | 5,023 |
Transfer |  |  | 5,515 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (5,515 | ) |  |  | — |
Disposals |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (311 | ) |  |  | — |  |  |  | (311 | )
Exchange adjustment |  |  | 202 |  |  |  | 21 |  |  |  | 3 |  |  |  | 348 |  |  |  | 2,279 |  |  |  | 2,853 |
At December 31, 2016 |  |  | 28,713 |  |  |  | 33,942 |  |  |  | 7,654 |  |  |  | 7,356 |  |  |  | 36,060 |  |  |  | 113,725 |
Acquisition of Bayannaoer Mining |  |  | 43 |  |  |  | — |  |  |  | 12 |  |  |  | 280 |  |  |  | — |  |  |  | 335 |
Additions |  |  | — |  |  |  | — |  |  |  | 71 |  |  |  | — |  |  |  | 4,137 |  |  |  | 4,208 |
Disposals |  |  | (5,781 | ) |  |  | (4,688 | ) |  |  | (786 | ) |  |  | (2,017 | ) |  |  | — |  |  |  | (13,272 | )
Exchange adjustment |  |  | (104 | ) |  |  | (21 | ) |  |  | (173 | ) |  |  | (35 | ) |  |  | (2,388 | ) |  |  | (2,721 | )
Disposal of subsidiaries |  |  | (22,828 | ) |  |  | (29,233 | ) |  |  | (5,939 | ) |  |  | (5,305 | ) |  |  | (37,809 | ) |  |  | (101,114 | )
At December 31, 2017 |  |  | 43 |  |  |  | — |  |  |  | 839 |  |  |  | 279 |  |  |  | — |  |  |  | 1,161 |
At December 31, 2017 (US$) |  |  | 6 |  |  |  | — |  |  |  | 129 |  |  |  | 44 |  |  |  | — |  |  |  | 179 |
Accumulated depreciation and amortization and impairment losses
At January 1, 2016 |  |  | (13,206 | ) |  |  | (33,608 | ) |  |  | (7,485 | ) |  |  | (2,471 | ) |  |  | — |  |  |  | (56,770 | )
Depreciation charge |  |  | (1,415 | ) |  |  | — |  |  |  | (55 | ) |  |  | (1,185 | ) |  |  | — |  |  |  | (2,655 | )
Disposals |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 301 |  |  |  | — |  |  |  | 301 |
Exchange adjustment |  |  | 16 |  |  |  | — |  |  |  | (1 | ) |  |  | (93 | ) |  |  | — |  |  |  | (78 | )
At December 31, 2016 |  |  | (14,605 | ) |  |  | (33,608 | ) |  |  | (7,541 | ) |  |  | (3,448 | ) |  |  | — |  |  |  | (59,202 | )
Depreciation charge |  |  | (530 | ) |  |  | — |  |  |  | (25 | ) |  |  | (1,193 | ) |  |  | — |  |  |  | (1,748 | )
Disposals |  |  | 5,121 |  |  |  | 4,688 |  |  |  | 715 |  |  |  | 1,742 |  |  |  | — |  |  |  | 12,266 |
Exchange adjustment |  |  | (84 | ) |  |  | — |  |  |  | (69 | ) |  |  | (46 | ) |  |  | — |  |  |  | (199 | )
Disposal of subsidiaries |  |  | 10,098 |  |  |  | 28,920 |  |  |  | 6,100 |  |  |  | 2,941 |  |  |  | — |  |  |  | 48,059 |
At December 31, 2017 |  |  | — |  |  |  | — |  |  |  | (820 | ) |  |  | (4 | ) |  |  | — |  |  |  | (824 | )
At December 31, 2017 (US$) |  |  | — |  |  |  | — |  |  |  | (126 | ) |  |  | (1 | ) |  |  | — |  |  |  | (127 | )
Net carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At December 31, 2016 |  |  | 14,108 |  |  |  | 334 |  |  |  | 113 |  |  |  | 3,908 |  |  |  | 36,060 |  |  |  | 54,523 |
At December 31, 2017 |  |  | 43 |  |  |  | — |  |  |  | 19 |  |  |  | 275 |  |  |  | — |  |  |  | 337 |
At December 31, 2017 (US$) |  |  | 6 |  |  |  | — |  |  |  | 3 |  |  |  | 43 |  |  |  | — |  |  |  | 52 |
An impairment loss on property, plant and equipment of CNY7.54 million of Yangchong Mine was recorded for the year ended December 31, 2015 in connection with the decline of average selling prices of iron concentrates. Yangchong Mine was designated as a single cash-generating unit ("CGU"), which was based predominantly on the value-in-use (“VIU”) approach. VIU calculations use pre-tax cash flow projections. Other key assumptions applied in the impairment tests include the production volume, expected iron price, product cost and related expenses. Management determined that these key assumptions were based on past performance and their expectations on market development. Further, at December 31, 2015, the Group adopted a pre-tax rate of 16.00% that reflects specific risks related to the CGU, as the discount rate. There was no further impairment loss on property, plant and equipment during the years ended December 31, 2016 and 2017.

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