[jiàn duō shí]
have great experience; experienced and knowledgeable; have a mind of wide scope; have a wide range of experience; have seen a great deal; have seen the elephant; have traveled far and wide and seen a good deal; have wide experience and extensive knowledge; well-informed and well-grounded
As a merchant, he was a man of the world -- he had seen it all.
他是一个见多识广的商人。