China is one of the most bleak nation in terms of prop era planes, as a result of near non-existent air force during the world wars and the lack of resources. The current tech tree is lacking in many ways including a bleak 5 vehicle rank V. This is an open discussion for any vehicle that fits in the gap.
Nanchang CJ-6A would be a good reserve tier plane
Spitfire Mk F24 (Royal Hong Kong Auxiliary Airforce)
Spitfire Mk XIV was also deployed to Hong Kong after WW2.
completely original planes there’s a couple like the Gamma 2E, H-75 fixed carriage but more “copy and paste” vehicles there’s a lot missing like the He-111A, Cr32 , P-26 and a bunch of other planes on chinese service
il-10 with chinese built turbo prop
Chu xp-0
Chu xp-1
Those two are my favorites
Grumman S-2T Turbo Tracker
Spoiler
Harbin SH-5
Spoiler
Both useful in some form of large scale naval warfare game of course, but utterly useless in WT.
Some I find interesting
He-111
P-40N
B-24M

For Rank V specifically though a subtree is the best bet. Pakistan for example operated Typhoons, Tempest IIs, and Sea Furies.
Yeah, having to grind a lines is painful. Pakistan will come sooner or later.
YOOO that looks nuts!
How well did it fly? Surely must’ve been a lot better right?
Probably faster but IDK, that turbo prop probably destroyed the balance and they have to readjust to the weight distribution.