UFOs ALONG THE GREAT WALL of CHINA

God's  beyond-awesome Universe is untold trillions of light years across.  It is a mathematical certainty then that there are other planets with living creatures inhabiting them who are far ahead of us technologically and in their social advancement.  There have been reports of UFOs during all of human history.  UFOs have appeared in art, literature and film.  Have they been visiting Earth with an agenda for centuries?  This story is about one visitation to Earth by extraterrestrials to ancient China.