Content abstract: In 2007, China's capital market entered the era of full circulation. Under full circulation, insider trading may be more serious than when there was equity separation. The question is how to effectively prevent major shareholders from engaging in insider trading. Another type of locational factor is the relative position (distance) between a public good and residents; this factor is converted into an indicator represented by the travel radius of residents for specific analysis. Conclusion. ∴°★Siqi.☆°.★··....