What about =How about,意思是一样的,可以互换的.
常用来引起一个问句,表示建议,征求意见或询问消息,意为"……好不好 ? ","……怎样 ? ".
后面可以接名词,代词和动名词
例如：
I'd like some rice . What about / How about you ?
What about going to see a film ?
How/What about a drink?" (喝杯酒怎么样?；喝杯酒好吗?).
再举一例："Where should we go on vacation?" "How about Hawaii?" "What about Japan?" ..