现就我们所知道的父亲李济深在“五一口号”发表后为早日实现“联合建国”的主张所作贡献进行叙述。潘汉年给李济深、沈钧儒送来了毛主席的亲笔信1948年5月1日,中共中央发布“五一口号”。与此同时,毛泽东主席派中共代表潘汉年给在香港的中国国民党革命委员会 Now, we will make a brief account of the contribution made by our father, Li Jishen, to the idea of ​​“united establishment of the nation” as soon as possible after the publication of the “May 1 slogan.” Pan Hannian sent Chairman Mao’s personal letter to Li Jishen and Shen Junru on May 1, 1948, and the CPC Central Committee issued the “51 slogan.” In the meantime, Chairman Mao Zedong sent Chinese delegate Pan Hannian to the Revolutionary Committee of the Chinese Kuomintang in Hong Kong