Research on the country-of-origin mage from the perspective of legitimacy theory 并列题名：Research on the country-of-origin mage from the perspective of legitimacy theory Research on the crime of extortion from the perspective of norm theory Research on the government and social organizations from the perspective of symbiosis theory 并列题名：Research on the crime of extortion from the perspective of norm theory Research on ship mortgage from the perspective of civil code research on Chinese internet histories from the perspective of social memory 并列题名：Research on the government and social organizations from the perspective of symbiosis theory Research on the governance of university departments in China from the perspective of governance theory Research on the legality principle from the perspective of rule of law