| 2017 | 2016 | |||||||
| RMB million | RMB million | |||||||
|
Cost |
||||||||
|
At 1 January |
402 | 344 | ||||||
|
Transfer from property, plant and equipment (note 18) |
4 | 58 | ||||||
|
Transfer to property, plant and equipment (note 18) |
(14 | ) | — | |||||
|
|
|
|
|
|||||
|
At 31 December |
392 | 402 | ||||||
|
|
|
|
|
|||||
|
Accumulated depreciation |
||||||||
|
At 1 January |
81 | 50 | ||||||
|
Transfer from property, plant and equipment (note 18) |
2 | 20 | ||||||
|
Transfer to property, plant and equipment (note 18) |
(5 | ) | — | |||||
|
Charge for the year (note 11) |
12 | 11 | ||||||
|
|
|
|
|
|||||
|
At 31 December |
90 | 81 | ||||||
|
|
|
|
|
|||||
|
Net book amount |
||||||||
|
At 31 December |
302 | 321 | ||||||
|
|
|
|
|
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