C1424 Visiting the Invisible Machine Model

"How far has the development of the new fighter reached?" Qin Guan asked Elder Soong.

At the end of 1981, Qin Guan had come here to inspect. At that time, Elder Soong had reported to Qin Guan. After Elder Soong had completed the test flight of the J-10, he gave the task of modifying it to his subordinates. As for himself