What are you talking about?It’s a well established fact China had access to the Israeli Lavi project which was a copy of the F-16. Pakistan had zero involvement with the J-10. Please stop peddling unsubstantiated and false claims.but Americans know we gave F16 for J10 project so yes in a way
Why China Looked To Israel's Lavi Jet For Its J-10 'Vigorous Dragon'
However, in the mid-1990s, U.S. newspapers began reporting that intelligence agencies were concerned about continued Israeli technology transfers to China—including some components given to Israel by the United States.
This included allegations that Israel had transferred Lavi technology for China’s program to develop a fourth-generation jet fighter. The Chengdu Aircraft Corporation had begun work on the J-10 in 1988 under engineer Song Wecong, who can be seen next to a Lavi in thisphoto (fourth from the right).
In his book Lavi: the United States, Israel and a Controversial Fighter, John W. Golan wrote:
Israeli involvement in the J-10 appears to have begun at around the same time that China first opened diplomatic relations with Israel in January 1992 . . . Israeli contractors were engaged to provide the aerodynamic and structural outlines for the J-10. The Israeli influences on the J-10’s design are unmistakable: a close-coupled, canard-delta arrangement; a single-engine fighter featuring a ventral engine inlet; twin ventral strakes; and an area-ruled fuselage.