Lei Erdeni, male, Mongolian nationality, is a native of Dalate Banner, Inner Mongolia Autonomous Region. He was born in 1948, and joined the CPC in 1976. Lei is an on-the-job postgraduate of the Party school of the CPC Central Committee. Lei held leading Party posts in the Ih Ju league, and he was a delegate to the 9th NPC. He was appointed vice-chairman of the Inner Mongolia Autonomous Region.
Lei Erdeni served as director and secretary of leading Party group of the Development and Planning Commission until 2002, and director of the information office until 2004.