Apr. 27, 1962 - The Chinese Communists are said to be stepping up their military advisory program in North Vietnam to counter the continuing build-up of U.S. forces in South Vietnam. One intelligence estimate speaks of as many as 3,500 Chinese soldiers now attached for training and support to the Communist North Vietnam Army. Of the estimated total of 16,000 North Vietnamese troops now believed to be among the Communist guerrillas in South Vietnam, large numbers are said to have profited from Chinese instruction. The Communist forces are raiding peasant outposts at a fairly constant rate, occupying a growing number of positions, and at times striking closer than ever to Saigon, the South Vietnamese capital. They struck within 12 miles of Saigon this week.