a fuddy-duddy; an old-fashioned person; a stick-in-the-mud
我的爷爷是个老古板，总是坚持用老式方法做事情，不愿意接受新鲜事物
My grandfather is a fuddy-duddy; he always insists on doing things the old-fashioned way and is unwilling to accept new ideas.
Next Idiom
a fuddy-duddy; an old-fashioned person; a stick-in-the-mud