TOP SECRET. asked for an estimate of the further numbers which can be accepted and whether he yet proposes any control over arrivals from Canton or regulation of entry across the frontier. Communist Amphibious Training: 6. A further report supporting our previous views+ that Communist Amphibious Training is taking place has now been received. It indicates that training on the Lower Yangtse has been in progress since the 1st August, 1949. Excercises involve infantry and artillery units and training in night assaults.