Two good books on the Chinese travels to Africa, for people interested in learning more, are Philip Snow's "The Star Raft" and J.J.L. Duyvendak's "China's Discovery of Africa"...
Just another set of...
FINGERPRINTS OF THE GODS.
Look, there are maps, known to be genuine, which document not only Africa, but ANTARTICA, and the latter continent's surface now covered under a mile thick ice cap. (The Piri Reis Map of the World, made in 1513, 300 years before Antarctica was "discovered")
Even the US Air Force is baffled by it.