华盛顿会议前,围绕派遣代表问题,南北政府争持不下。马素作为孙中山驻美代表,为获南方政府单独派遣代表机会及美国政府承认,积极活动,但效果甚微;华会期间,马素驳斥中国代表团所提十项原则,反对借款赎路,并及时将一些消息告知国内;华会结束后,受南方政府之命通告美国以民款赎路非法。马素在此期间的活动,时人褒贬不一。 Before the Washington meeting, the North and South governments clung to the issue of sending delegates. As a representative of Sun Yat-sen’s presence in the United States, as a solo representative of the South China Government and recognition and active recognition by the U.S. government, Ma Su has little effect; during the Huaying visit, Ma Su refutes the ten principles proposed by the Chinese delegation and opposes loot redemptions, And informed some of the news in a timely manner. After the Huayin event, it was informed by the orders of the southern government that the United States renounced people’s money for redemption. Ma Su activities in the meantime, people mixed judgments.