| | For the year ended December 31, 2017 | | |||||||
| | Display | | Solar | | Total segments | | |||
| | (in thousands) | | |||||||
Net revenue from external customers | | $ | 322,335,330 | | | 18,692,937 | | | 341,028,267 | |
Depreciation and amortization | | $ | 34,816,463 | | | 1,613,373 | | | 36,429,836 | |
Inventory write-down | | $ | 3,423,097 | | | 333,629 | | | 3,756,726 | |
Segment profit (loss)(i) | | $ | 39,971,375 | | | (832,251) | | | 39,139,124 | |
Other income | | | | | | | | | 3,829,897 | |
Other gains and losses | | | | | | | | | (976,560) | |
Finance costs | | | | | | | | | (2,867,861) | |
Share of profit of equity-accounted investees | | | | | | | | | 239,006 | |
Consolidated profit before income tax | | | | | | | | $ | 39,363,606 | |
| | For the year ended December 31, 2016 | | |||||||
| | Display | | Solar | | Total segments | | |||
| | (in thousands) | | |||||||
Net revenue from external customers | | $ | 304,826,682 | | | 24,262,354 | | | 329,089,036 | |
Depreciation and amortization | | $ | 37,860,430 | | | 1,832,810 | | | 39,693,240 | |
Inventory write-down | | $ | 3,288,067 | | | 385,146 | | | 3,673,213 | |
Segment profit (loss)(i) | | $ | 12,703,548 | | | (365,092) | | | 12,338,456 | |
Other income | | | | | | | | | 2,380,228 | |
Other gains and losses | | | | | | | | | (925,673) | |
Finance costs | | | | | | | | | (2,707,887) | |
Share of profit of equity-accounted investees | | | | | | | | | 100,778 | |
Consolidated profit before income tax | | | | | | | | $ | 11,185,902 | |
| | For the year ended December 31, 2015 | | |||||||
| | Display | | Solar | | Total segments | | |||
| | (in thousands) | | |||||||
Net revenue from external customers | | $ | 333,392,294 | | | 26,954,200 | | | 360,346,494 | |
Depreciation and amortization | | $ | 44,790,075 | | | 2,955,774 | | | 47,745,849 | |
Inventory write-down | | $ | 5,607,166 | | | 54,100 | | | 5,661,266 | |
Segment profit (loss)(i) | | $ | 19,225,952 | | | (1,704,804) | | | 17,521,148 | |
Other income | | | | | | | | | 2,197,593 | |
Other gains and losses | | | | | | | | | (9,978,320) | |
Finance costs | | | | | | | | | (2,591,023) | |
Share of profit of equity-accounted investees | | | | | | | | | 449,452 | |
Consolidated profit before income tax | | | | | | | | $ | 7,598,850 | |
(i) | There were no intersegment revenues or other transactions between operating segments for the years ended December 31, 2017, 2016 and 2015. |