Which best describes china's relations with the outside world?

Explanation: they refused to westernize and modernize. They wanted no contact with the outside world. They referred to outsiders as barbarians. before the opium wars, they only had one port open for trade (Canton), and after the war they were forced to open more ports. China only wanted to retain their beliefs. Then Sun Yixian came and they modernized

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.