Though this move came at a time when food shortages were acute in China. Pekings response was to denounce the President and to reject any trade with the United States. The United States has offered visas to Chinese Communist doctors. allowing them to visit medical institutions here even if American doctors were not allowed to visit mainland China. Peking has rejected such offers. The United States has offered visas to Chinese Communist professors and scholars for visits to American universities. even if our professors and scholars were not allowed to travel to Red China. Peking has rejected such offers. The United States has revised its travel bans to allow American physicians. medical scientists. and scholars to travel to Communist China.