| Revenue | 31/12/2017 | 31/12/2016 | 31/12/2015 | 31/12/2014 |
| Total revenue | 1,604,470,054.66 | 1,696,532,510.86 | 1,633,716,838.65 | 1,496,541,441.33 |
| Cost of revenue | 789,064,959.26 | 786,139,557.14 | 761,057,253.83 | 723,258,689.86 |
| Gross profit | 815,405,095.4 | 910,392,953.72 | 872,659,584.82 | 773,282,751.47 |
| Operating expenses |
| Research development | 64,234 | 114,514 | 108,201 | 48,445 |
| Selling general and administrative | 268,878,186 | 276,553,023 | 263,302,262 | 246,634,775 |
| Non-recurring | - | - | - | - |
| Others | 2,081,589 | 2,000,548 | 2,257,347 | 2,115,964 |
| Total operating expenses | 1,073,576,851.26 | 1,081,263,109.14 | 1,048,314,435.83 | 998,823,879.86 |
| Operating income or loss | 530,893,203.4 | 615,269,401.72 | 585,402,402.82 | 497,717,561.47 |
| Income from continuing operations |
| Total other income/expenses net | 35,301,021.32 | -18,408,862 | 8,480,978.06 | -1,782,602.1 |
| Earnings before interest and taxes | 530,893,203.4 | 615,269,401.72 | 585,402,402.82 | 497,717,561.47 |
| Interest expense | -236,815 | -237,164 | -226,922 | -247,465 |
| Income before tax | 566,194,224.72 | 596,860,539.72 | 593,883,380.88 | 495,934,959.37 |
| Income tax expense | 128,653,717.89 | 142,326,882.45 | 152,254,279.46 | 136,586,390.11 |
| Minority interest | 131,255.97 | 205,257.89 | 260,721.42 | 276,851.18 |
| Net income from continuing ops | 437,540,506.83 | 454,533,657.27 | 441,629,101.42 | 359,348,569.26 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 437,614,528.67 | 454,589,520.64 | 441,645,201.92 | 359,363,729.59 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 437,614,528.67 | 454,589,520.64 | 441,645,201.92 | 359,363,729.59 |