Taiwan's CAA has vowed to save the "A1" flight path, which is the most important international flight path between Asia and North America, as well as between Hong Kong and Japan.
There are major concerns whether "A1" path should be shut down or not. There has been 5 major air disasters in 16 years occured in the "A1" path, which flies over Peng-hu Island, above Taiwan strait.
Taiwan says if they banned A1 path, it'll make Taiwan being isolated, due to International flight will re-route their path over mainland China.
"A1" path was established due to China's policy in the past, which banns international flights flying over South East coast of China.
There are at least 300 flights daily using "A1" path, and helps Taiwan to earn NT$366million/year.
If "A1" path is banned, planes will have to re-route to "W4". Airlines using "W4" path will fly along West Coast of Taiwan to Tainan or Heng-Chung, then turn it's way towards HK/Macau. Another alternatives is "B591" (flies East coase of Taiwan), which is a time and fuel-wasting route for international flight.
The "A1" path is now being described as the "Bermuda Triangle". 5 crash in 16 years occured here, including the latest Transasia Airways ATR72F crash and China Airlines 747 crash in May.