Looks much more like a WIG craft to me, certainly it has solid sidewalls. But it does have a lift fan driven by a second M-11 radial engine. It looks a rough and ready conversion job (the forward fuselage facing aft, bolted to the deck with an extension driveshaft and the aft fuselage facing forwards on simple struts) but the hull seems well designed and this must be one of the earliest WIG vehicles.
What is also interesting are the two Yak-18/CJ-5 fuselages, both are single-seaters with a canopy very similar to the Yak-18P. The canopy looks a pretty neat job with all-round perspex panels to be a simple cut-and-shut job from a standard tandem seater. I wonder if China received any Yak-18Ps from the USSR or if any single-seat CJ-5s were built?