Possibly a dinner to welcome the Dixie Mission, American Observation Group. Mao Zedong stands in the foreground with back to camera on the left in dark clothing.
Source of Descriptive Information
Alexander, B. (1992). The triumph of China: the middle kingdom's long march from degradation to world power in the twentieth century. Farrar, Straus & Giroux. Available at http://bevinalexander.com/china/27-dixie-mission.htm