AIM-9 Sidewinder (USA) ➤ K-13/R-3 (USSR)

On 28 September 1958,one of the missiles becoming lodged in a MiG-17 without exploding, allowing it to be removed after landing. The Soviets later became aware that the Chinese had at least one Sidewinder, and after some wrangling, were able to convince the Chinese to send them one of the captured missiles. Gennadiy Sokolovskiy, later chief engineer at the Vympel team, said that “the Sidewinder missile was to us a university offering a course in missile construction technology which has upgraded our engineering education and updated our approach to production of future missiles.”

The Sidewinder was quickly reverse engineered as the K-13 (also called R-3 or Object 300) and entered limited service only two years later in 1960
— Wikipedia

AIM-9 Sidewinder air-to-air missile (USA) , 1953 (Wiki)

K-13/R-3 air-to-air missile (USSR), 1960 (Wiki)