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Operating Segments Information (Tables)
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Summary of Segment Information
 
a.
Segment revenues and operation results
 
Note 1: Inter-group revenues were eliminated upon consolidation.
 
Note 2: The disaggregated product and service type from the Group's contract with customer is the same as those disclosed in above reportable segment.
 
Summary of Revenue from Major Products and Services
 
b.
Revenue from major products and services
 
 
 
For the Year Ended December 31
 
 
2018
 
2019
 
2020
 
 
NT$
 
NT$
 
NT$
 
US$ (Note 4)
 
 
 
 
 
 
 
 
 
Packaging service
 
$
178,308,222
 
 
$
198,916,897
 
 
$
218,666,071
 
 
$
7,787,253
 
Testing service
 
 
35,903,202
 
 
 
42,658,686
 
 
 
47,271,074
 
 
 
1,683,443
 
EMS
 
 
151,890,384
 
 
 
165,789,479
 
 
 
204,690,669
 
 
 
7,289,554
 
Others
 
 
4,990,613
 
 
 
5,817,122
 
 
 
6,350,896
 
 
 
226,171
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$
371,092,421
 
 
$
413,182,184
 
 
$
476,978,710
 
 
$
16,986,421
 
Summary of Geographical Information
c.
Geographical information
2)
Non-current assets
 
 
December 31
 
 
2019
 
2020
 
 
NT$
 
NT$
 
US$ (Note 4)
 
 
 
 
 
 
 
Taiwan
 
$
239,532,971
 
 
$
239,353,978
 
 
$
8,524,002
 
China
 
 
68,747,648
 
 
 
63,907,990
 
 
 
2,275,926
 
Others
 
 
26,645,450
 
 
 
34,107,657
 
 
 
1,214,660
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$
334,926,069
 
 
$
337,369,625
 
 
$
12,014,588
 
 
Non-current assets exclude financial instruments, post-employment benefit assets, and deferred tax assets.