German population has shown the trend of decreasing and aging,which inevitably requires more immigrants,especially those with high working skills.However,foreign immigrants have brought great challenges to the German society,whereas the discussion on muslims' integration reached its peak in 2010 with Sarrazin's radical rhetoric.And,the tendency that the German right-wing extremists use violence is on the increase.Besides,even if the number of unemployed in Germany has been decreasing continuously since recent years,a huge amount of positions come from the low-income sector,which has broaden the gap between rich and poor in Germany,and the problem of poverty has also worsened obviously. <<