We introduce the concept of braided anti-flexible bialgebra and construct
cocycle bicrossproduct anti-flexible bialgebras. As an application, we solve
the extending problem for anti-flexible bialgebras by using some non-abelian
cohomology theory.Comment: 37 pages, many typos, misprints and English language errors are
corrected.The proofs which contain long direct computations are shortened.
Continues arXiv:2112.11977 and arXiv:2203.1569