From 1949 through 1956, a scientific and technical support program was in effect between the U.S.S.R. and P.R.C. Under this program, among other things, the Soviets shared the blueprints of promising warships with China. In particular, China received technical documentation on a Project 41 destroyer. While China didn't build any ships of this project in its original form, between 1968 and 1987, they built fifteen 051-class (Luda-class) missile destroyers that were based on the Soviet Project 41.