Why is the front like what exactly? Having a nose-mounted intake was quite common when the original MiG-21 was designed, and that is what the F-7 is based on. Its actually a very efficient design when it comes to airflow, speed, and overall performance. The main problem is it limits the size of the radar fitted in the small radome, which was a big problem when the plane was first introduced by in today's world of advanced avionics, you can actually fit a pretty decent radar on them.