Could be the proposed J-13 that lose to J-10.
Below is from Globalsecurity.org
1971 - J-13 Shenyang 601 Institute
The J-13, designed by Shenyang Aircraft Corporation, never entered production. The single engined fighter design was cancelled in the early 1990s. The genesis of the first J-13 was in 1971, when the 601 Institute began researching a new fighter aircraft for the 1980s to replace the J-6. The new aircraft used cantilever wings and fuselage side mounted air intakes - it resembled the French Mirage-F1. In 1972, the 601 Institute commissioned Shen Fei to conduct a survey to find out what kind of future fighters the PLA Air Force and the Navy wanted. The investigation continued until the end of 1974. At the beginning of 1974, with the accumulation of a large amount of first-hand information, Shen Fei promoted his advanced fighter concept to the Air Force. Under the unremitting promotion of Shen Fei, the National Conventional Equipment Development Leading Group was officially approved on April 24, 1976, and the development of the J-13 fighter aircraft project was approved.
In 1978, after the Third Plenary Session of the Eleventh Central Committee, reform and opening up were implemented. Then, at the 13th National Congress of the Communist Party of China, the basic line of "taking economic construction as the center" was put forward, and army building had to make way for economic construction. The J-13 Fighting Fighter was also forced to stop research in March 1981 due to the adjustment of the national economy and air force equipment development plan. The project was finally abandoned because of the success of the Chengdu J-10 project
No, it seems to be indeed something different ... would be interesting to know what design team was responsible for it?