The light bomber was tasked with missions similar to those of modern attack aircraft and strike fighters.
It was originally planned to support light bombers and thereby would need a bomb store near the site.
It had a much simpler design, but proved just as capable, and was easily adapted into a light bomber.
Both were low-level light bombers with similar bomb-loads and entered squadron service in 1937.
They envisioned a small air corps of 500 combat aircraft, although in the end, the number was reduced to 200 fighters and 66 light bombers.
Hence the J-20 is not a fighter, but rather a light supersonic bomber.
The objective of the light bomber, he saw, was the landing strip nearest to Lab 4.
His war record includes 394 combat missions in light bombers on the Eastern Front.
Two Japanese light bombers were shot down over the airfield in full view of the construction engineers.
Towards the end of its service life, it was developed into a light bomber.