并列题名：Resource allocation effect and system optimization of land taxes and fees in China Resource allocation effect and system optimization of land taxes and fees in China Resource allocation effect and system optimization of land taxes and fees in China. 并列题名：Research on construction and system optimization of natural gas reserve system in China 并列题名：Economic effect of structure optimization of finance expenditure in China 并列题名：Poverty resources allocation effect and optimization mechanism of contiguous poverty area