One of two Tupolev Tu-4s at the museum. With the original piston engines replaced by four Ivchenko AI-20K turboprops, this version was used as a drone carrier. In more recent years it has been displayed with a WZ-5 reconnaissance drone under each wing

A gift from Stalin in 1953 and refitted with turboprops between 1970 and 1973. The last PLAAF Tu-4 was retired in 1988. The red thing hanging undeneath the wing is a WZ-5 reconnaissance drone, which entered service in 1981.

Tupolev developed the Tu-2 from Boeing B-29 WW2 bombers, of which one is seen here with RPV/drones under its wings

Obviously a Chinese derivative of the B-29 but note that turboprop engines have replaced the piston originals.

There are two of these extraordinary turboprop conversions of the Russian-built B-29 at Datangshan, one an AEW variant and this drone carrier. The engines were the Ivchenko AI-20, as used in the Il-18