Ren Weiguang, vice president and general manager of Motorola's (MOT) mobile business in China, resigned on October 31, 2008.

Ren published the news through an internal email on Thursday, October 30. Gao Ruibin, president of Motorola China, will serve as general manager in the interim, reports local media.

Ren worked in Motorola's Mobile Business Department for about five years. Before joining the company in 2003, he had been senior managers in such multinational corporations as Compaq, Nokia and Siemens. Over his term as general manager of Motorola's mobile business in China, Ren once increased the company's market share in China by over ten percentage points.

However, affected by the decline of Motorola's market share in the global market, the company's performance in China has also decreased. According to the latest report of Motorola, the company had a USD397 million loss in the third quarter of 2008 and it has announced plans to cut costs by USD800 million in 2009.

Neither Motorola nor Ren himself have specifically mentioned the reason for his departure.