海外公干 meaning in English

overseas duty

Their work required them to travel substantially outside hong kong
他们均需时常往海外公干。
Warren : how did your business trip go ? it was your first one overseas , right
华伦：你出差情况怎样？这是你第一次到海外公干，对吗？
Director of admissions and financial aid ( ms . fanny yuen to act in the absence of mrs . chow )
(周处长休假或海外公干期间由袁美茵女士署任)