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Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2017
Long Term Bank Loans [member] |
Summary of Borrowings | The others were long-term bank loans with floating interest rates and consisted of the followings:
|  | December 31
|  | 2016 |  | 2017
|  | NT$ |  | NT$ |  | US$ (Note 4)
Working capital bank loans |  |  |  |  |  |
Syndicated bank loans - repayable through January 2018 to July 2018, annual interest rates were 2.55% and 2.61% -2.70% as of December 31, 2016 and 2017, respectively |  | $ | 9,223,500 |  |  | $ | 4,761,600 |  |  | $ | 160,647 |
Others - repayable through January 2018 to December 2019, annual interest rates were 0.74%-4.48% and 0.93%-2.10% as of December 31, 2016 and 2017, respectively |  |  | 36,009,917 |  |  |  | 22,441,947 |  |  |  | 757,151 |
Mortgage loans |  |  |  |  |  |  |  |  |  |  |  |
Repayable through July 2018 to June 2023, annual interest rates were both 4.95%-5.39% as of December 31, 2016 and 2017 |  |  | 4,390,003 |  |  |  | 4,705,149 |  |  |  | 158,743 |
|  |  | 49,623,420 |  |  |  | 31,908,696 |  |  |  | 1,076,541 |
Less: unamortized arrangement fee |  |  | 7,198 |  |  |  | 1,200 |  |  |  | 40 |
|  |  | 49,616,222 |  |  |  | 31,907,496 |  |  |  | 1,076,501 |
Less: current portion |  |  | 6,567,565 |  |  |  | 6,761,625 |  |  |  | 228,125 |
|  | $ | 43,048,657 |  |  | $ | 25,145,871 |  |  | $ | 848,376 |
Longterm Bills Payable [member] |
Summary of Borrowings |
| 2) | Long-term bills payable
|  | December 31
|  | 2016 |  | 2017
|  | NT$ |  | NT$ |  | US$ (Note 4)
China Bills Finance Corporation, repayable in February 2019, annual interest rate was 0.96% |  | $ | - |  |  | $ | 1,000,000 |  |  | $ | 33,738 |
International Bills Finance Corporation, repayable in March 2019, annual interest rate was 0.96% |  |  | - |  |  |  | 1,000,000 |  |  |  | 33,738 |
Ta Ching Bills Finance Corporation, annual interest rates was 1.00% and has been repaid in December 2017 |  |  | 2,000,000 |  |  |  | - |  |  |  | - |
|  |  | 2,000,000 |  |  |  | 2,000,000 |  |  |  | 67,476 |
Less: unamortized discounts |  |  | 659 |  |  |  | 868 |  |  |  | 29 |
Long-term borrowings |  | $ | 1,999,341 |  |  | $ | 1,999,132 |  |  | $ | 67,447 |
| 2) | Long-term bills payable
|  | December 31
|  | 2016 |  | 2017
|  | NT$ |  | NT$ |  | US$ (Note 4)
China Bills Finance Corporation, repayable in February 2019, annual interest rate was 0.96% |  | $ | - |  |  | $ | 1,000,000 |  |  | $ | 33,738 |
International Bills Finance Corporation, repayable in March 2019, annual interest rate was 0.96% |  |  | - |  |  |  | 1,000,000 |  |  |  | 33,738 |
Ta Ching Bills Finance Corporation, annual interest rates was 1.00% and has been repaid in December 2017 |  |  | 2,000,000 |  |  |  | - |  |  |  | - |
|  |  | 2,000,000 |  |  |  | 2,000,000 |  |  |  | 67,476 |
Less: unamortized discounts |  |  | 659 |  |  |  | 868 |  |  |  | 29 |
Long-term borrowings |  | $ | 1,999,341 |  |  | $ | 1,999,132 |  |  | $ | 67,447 |

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