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## Income from operations and Operating Margin 

As a result of the foregoing, our income from operations increased by 1.7% from NT$56.4 billion in 2009 to NT$57.4 billion in 2010. Our operating margin decreased from 28.5% in 2009 to 28.3% in 2010. 

The following table sets forth certain information regarding our operating income by business segment for the periods indicated. 

<img src='content_image/290098.jpg'>

As a result of the foregoing, segment income before tax for our domestic fixed communications business increased by 3.4% from NT$17.4 billion in 2009 to NT$18.1 billion in 2010; segment income before tax for our mobile communications business decreased by 2.8% from NT$30.2 billion in 2009 to NT$29.3 billion in 2010; segment income before tax for our internet business increased by 5.1% from NT$9.3 billion in 2009 to NT$9.8 billion in 2010; segment income before tax for our international fixed communications business increased by 4.0% from NT$2.6 billion in 2009 to NT$2.7 billion in 2010; and segment loss for our others business segment decreased by 5.5% from NT$2.3 billion to NT$2.2 billion. 

## Other Income, Net 

Our other income, net decreased by 62.1% from NT$0.8 billion in 2009 to NT$0.3 billion in 2010. This decrease was primarily to a NT$0.2 billion loss on disposal of property, plant, and equipment, and a NT$0.1 billion net loss on valuation and disposal of financial instruments, and a NT$0.1 billion net loss on foreign exchange. 

## Income Tax 

Our income tax was NT$12.7 billion in 2009, compared to NT$9.1 billion in 2010. Our effective tax rate was 22.3% in 2009 and 15.8% in 2010, primarily due to the reduction of the corporate income tax rate in the R.O.C. from 25% to 17% effective from 2010. Please refer to “Item 5. Operating and Financial Review and Prospects—Taxation” for a discussion of the change in tax rate. 

