Chinese nationalist trainees undergo a rigorous conditioning program under the supervision of US. Advisors, to qualify for underwater demolition duties. Only 1 in 7 qualify for the hazardous service. Establishing shot - Chinese Nationalist, trainees. CUS - A Chinese's man tattooed chest. MS - Chinese men exercising MS - Chinese men sitting on the deck of a boat putting on swimming flippers. CUS - Chinese men on a rubber raft secured to a speeding boat, they roil into the water. CUS - The boat is traveling at 20 knots and one of the men is holding a rubber hoop picking up the men from the water.