He has also been director of the Far East Commercial Office in Santiago, Chile (1975-1981), director of the Taiwan Commercial Office in Argentina (1986–90) and representative for the Taiwan Economic and Cultural Office in Spain (2000–03).
When veteran diplomat Francisco Ou resigned with the Cabinet of Premier Liu Chao-Shiuan in September 2009, President Ma Ying-Jeou named Yang to the post, to serve in the newly formed Cabinet of incoming Premier Wu Den-yih.
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