Research on the optimization path of China's cruise industry structure from the perspective of comprehensive tourism 并列题名：Research on the optimization path of China's cruise industry structure from the perspective of comprehensive tourism Research on the termination system of contracts from the perspective of comparative law Research on the transformation and upgrading of Liaoning industrial structure from the perspective of trade structure optimization Research on the construction of Chinese online education system from the perspective of lifelong for all 并列题名：Research on the transformation and upgrading of Liaoning industrial structure from the perspective of trade structure optimization Research on the compilation of Ming History in Qing Dynasty from the perspective of cultural identity Research on the evolution of China's distribution system from the perspective of history of economic thought Research on the functional defects of China's capital market from the perspective of cost of capital Research on the legal system of estate administration from the perspective of comparative law