Chinese Wall　

Chinese Wall　中国墙（投资银行部与销售部或交易人员之间的隔离）　

a notional information barrier between the separate divisions，departments，or teams of a business to guarantee that no improper or price-sensitive unpublished information passes between them.Communication barrier between financiers（investment bankers）and traders.This barrier is erected to prevent the sharing of inside information that bankers are likely to have.