In May 1970, the
Shenyang design team for the
J-9 moved to Chengdu; this was part of the "
Third Line" program that moved defence industries to the interior to make them less vulnerable to foreign attack. The team was later renamed as the 611 Institute. The design work on the cancelled double-canard J-9 influenced later CADI designs. The
Chengdu J-10 used the double-canard layout. The
Chengdu J-20 also used canards. ==Products==