Unusual that the first three sessions are for the middle, bow and stern ribs of the ship and the fourth is for the keel and berth which I assume is a building jig. Must be a new way of building the ship which I am not familiar with. Very curious to see actual photos or plans of the build. I have seen the same listing on Taobao also.
Caf has put this new model on 4H model.com with some new pictures.
And he is offering a rebate scheme for new and excisting customers. Be aware this is translated from Chinese by google translate. He is directly selling his models via the Taobao shop which you can find here, also in Chinese only. This vessel is not on yet. https://shmodel.taobao.com/
Caf is mentioned in the English translation as Rotation model or Spin model, sorry google translate again.