Two things are totally different... The cave mentioned in the article only exists in northern China and is man made. While the cave in the picture you post is in souther China and is natural cave.
History always repeats itself. If you know about the history of ancient China, your theory makes sense to some extent. Smart rulers could have the country in his (and his offspring's) control for more than 300 years. Bad ones could merely last for 100 years.