Hierarchy of management that covers different levels of management
907 a.d.
1. 907 A.D.- Tang Dynasty.
unable to prevent corruption and other
problems in government.
900s China became weak by foreign rebellions.
in 907 Tang rule collapsed.
New civil war started Rise of Song Dynasty.
http://www.chinahighlights.com/travelguide/chi
na-history/the-tang-dynasty.htm