Economic spatial structure optimization and coordinated development in Western China 并列题名：Economic spatial structure optimization and coordinated development in Western China Economic effect of structure optimization of finance expenditure in China On industrial spatial differentiation and coordinated development of regional economy in China Poverty reduction and sustainable development in western China Regional economic spatial polarization and coordinated development 并列题名：Economic effect of structure optimization of finance expenditure in China Exchange rate alternation, trade liberalization and coordinated development of China's economy Research on the regional coordinated development in China Study on the relationship between economic and social coordinated development in northwest China