1. Thoughts from Gini coefficient The Gini coefficient is an index that reflects the economic income gap in a society. Inequity will appear and some unstable factors will start to emerge in a society when the economic income gap between the rich and the unprivileged group is over 0.4. Beijing is the capital city of China, whose socio-economic stability shoulders the 1. Thoughts from Gini coefficient The Gini coefficient is an index that reflects the economic income gap in a society. Inequity will appear and some unstable factors will start to emerge in a society when the economic income gap between the rich and the unprivileged group is over 0.4. Beijing is the capital city of China, whose socio-economic stability shoulders the