| Revenue | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Total Revenue | 2,008,821 | 1,866,131 | 1,562,662 | 1,436,849 |
| Cost of Revenue | 1,771,981 | 1,612,510 | 1,339,492 | 1,236,108 |
| Gross Profit | 236,840 | 253,621 | 223,170 | 200,741 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 136,603 | 126,732 | 105,417 | 111,689 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 1,908,584 | 1,739,242 | 1,444,909 | 1,347,797 |
| Operating Income or Loss | 100,237 | 126,889 | 117,753 | 89,052 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -327 | 6,076 | 2,634 | 712 |
| Earnings Before Interest and Taxes | 100,237 | 126,889 | 117,753 | 89,052 |
| Interest Expense | - | - | - | - |
| Income Before Tax | 99,910 | 132,965 | 120,387 | 89,764 |
| Income Tax Expense | 16,386 | 44,739 | 42,991 | 31,740 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 83,524 | 88,226 | 77,396 | 58,024 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 83,524 | 88,226 | 77,396 | 58,024 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 83,524 | 88,226 | 77,396 | 58,024 |