| 2017 | 2016 | 2015 | ||||||||||||||
| Note | Million | Million | Million | |||||||||||||
|
Maintenance |
55,737 | 53,852 | 53,991 | |||||||||||||
|
Impairment loss of doubtful accounts |
3,392 | 3,734 | 4,839 | |||||||||||||
|
Write-down of inventories |
297 | 282 | 272 | |||||||||||||
|
Amortization of other intangible assets |
515 | 499 | 274 | |||||||||||||
|
Operating lease charges |
||||||||||||||||
|
- land and buildings |
11,453 | 11,628 | 13,447 | |||||||||||||
|
- others |
(i) | 3,698 | 4,248 | 6,186 | ||||||||||||
|
Loss/(gain) on disposal of property, plant and equipment |
8 | (180 | ) | (4 | ) | |||||||||||
|
Write-off and impairment of property, plant and equipment (note 14) |
12,593 | 7,216 | 7,614 | |||||||||||||
|
Power and utilities expenses |
30,518 | 29,461 | 27,134 | |||||||||||||
|
Operation support and research and development expenses |
(ii) | 38,016 | 32,296 | 27,209 | ||||||||||||
|
Auditors’ remuneration |
||||||||||||||||
|
- audit services |
(iii) | 107 | 103 | 97 | ||||||||||||
|
- tax services |
3 | 1 | 1 | |||||||||||||
|
- other services |
12 | 9 | 4 | |||||||||||||
|
Others |
(iv) | 25,894 | 23,924 | 21,229 | ||||||||||||
|
|
|
|
|
|
|
|||||||||||
| 182,243 | 167,073 | 162,293 | ||||||||||||||
|
|
|
|
|
|
|
|||||||||||
Note:
| (i) | Other operating lease charges represent the operating lease charges for motor vehicles, computer and other office equipment. |
| (ii) | Operation support and research and development expenses mainly include support expenses for new business operation, research and development cost for new technology evolution, amortization of testing equipment, and other related costs. |
| (iii) | Audit services include reporting on the Group’s internal control over financial reporting pursuant to Section 404 of the Sarbanes-Oxley Act of the United States of America with the service fee amount of RMB22,000,000 (2016: RMB22,000,000; 2015: RMB20,000,000). |
| (iv) | Others consist of administrative expenses, property management expenses, taxes and surcharges, and other miscellaneous expenses. |