Their father went to Shanghai on b---- not for leisure.

Their father went to Shanghai on business not for leisure.
Lucy,have you ever spoken to a foreigner to pracitice your English?
(这一句很别扭,老外是你的陪练吗?这样的想法是在占别人的便宜,
Lucy,have you ever spoken to a foreigner to improve your English?）
Actions speak louder than words.