Also, keep in mind pictures of the partially built Ulyanovsk hull show it was built by the traditional plate on longitudinal framing technique, not modular technique. This means Kuznetsov was likely also built in the same manner. This means the Chinese carrier must be structurally significantly different from Kuznetsov just to accommodate totally different construction technique. If they were willing to embark a this departure, which would effect the detailed design of every part of the hull, it is hardly plausible they would shy away from getting rid of the remnants of a unwanted compartment.