NEW : Four dead , many injured in early reports . Quake destroyed 300 residential buildings , damages 55,000 in Yunnan province . Many people forced to relocate . Same remote region was struck by a quake on Sunday .
NEW : Four dead , 10 injured in early reports . Quake topples 600 residential units , damages 55,000 in Yunnan Province . 9,200 people forced to relocate . Same remote region was hit by a quake on Wednesday .