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米高扬设计局研制的米格-21飞机被世界上许多国家广泛使用,而作为米格-21在中国的发展版本,歼7飞机在中国和其他不少国家也大量的装备。早在1961年3月,中国就和苏联签订协议引进了米格-21φ-13型飞机的全套生产图纸和技术资料,打算在国内进行该机的仿制。协定里规定苏联向中国提供一架米格-21φ-13型飞机的整机作为样机来供中方在仿制过程中参考,并提供15架份的散装组合件在国内进行组装。同时空军还直接
MiG-21 developed by Mikoyan Design Bureau is widely used in many countries in the world. As a development version of MiG-21 in China, the F-7 is also equipped with a large amount of equipment in China and many other countries. As early as March 1961, China signed an agreement with the Soviet Union to introduce a full set of production drawings and technical documents of the MiG-21φ-13 aircraft in preparation for its domestic imitation. The agreement stipulates that the Soviet Union will provide China with a MiG-21φ-13 aircraft as a prototype for reference by the Chinese side in the process of imitation and to provide a 15-piece bulk assembly to be assembled domestically. At the same time the Air Force also directly