Taiwan's Chinatimes recently reported that Taiwan's EVA Airways and Far Eastern Air Transport has signed a secret document which will covering both airlines to flying each other's international route with their own plane.
EVA's Kaohsiung-Macau, which now operated by it's subsidiary UNI Air's MD90, may now be operated by Far Eastern Air Transport (FAT)'s B757.
FAT's international resort destinations, which are operated by its 757s, may sometimes operated by EVA's B767-200ER.
Both company will not making the official announcement about those, and no exact date on whether when will this be effected.
Taiwan's airline are in bloody competition on domestic route. Taiwan's airline are now facing the problem of too many planes, but not many people flying it.