Deputy Defense Minister Hsu Szu-chien  (徐斯儉)  attended a handover ceremony in the United States on March 17 for the Republic of China Air Force's first two MQ-9B high-altitude unmanned aerial vehicles.(國防部副部長徐斯儉於3月17日在美國出席了中華民國空軍首批兩架MQ-9B高空無人機的交接儀式。)