In the first phase , representatives of the Soviet Union , the United Kingdom , and the United States convened between August 21 and September 28 .
The conversations were held in two phases , since the Soviets were unwilling to meet directly with the Chinese .
In the first phase , representatives of the Soviets   , the United Kingdom , and the United States convened between August 21 and September 28 .
The conversations were held in two phases , since the Soviets were unwilling to meet directly with the Chinese .