The Group leases operating machinery and equipment and transportation vehicles under a number of finance lease agreements. At the end of the term of the lease, the Group obtains ownership of the assets or has an option to purchase leased assets at a bargain price.
| December 31, 2017 |
December 31, 2016 |
|||||||
|
Net book value — operating machinery and equipment |
1,516 | 2,825 | ||||||
|
Net book value — transportation vehicles |
9,690 | 9,265 | ||||||