He later became the Chinese Ambassador to the United States and focused on maintaining the alliance between the Republic of China and the United States as the Kuomintang began losing to the Communists and had to retreat to Taiwan.
Mais tarde, foi embaixador nos Estados Unidos tentando manter a alianza entre a República de China e os Estados Unidos mentres o Kuomingtang comezaba a perder fronte os comunistas chineses e tiñanse que retirar a Taiwan.