In 1970 the Shenyang Aircraft Factory relocated the J-7 to the Chengdu Aircraft Factory, allowing the Shenyang Aircraft Factory to concentrate on the J-8 fighter.
Chinese decided to increase the J-7I's armament by reverting to the MiG-21F's original twin cannon arrangement, built-in one plus Type 30-1 cannon on the left side. The Chengdu Aircraft Factory produced 34 pcs J-7I modified fighter between 1970 and 1971.
In 1971, production was re stopped. The PLAAF did not take over the J-7I produced during the Cultural Revolution, due to poor manufacturing quality, design flaws, and unsatisfactory performance.