Marx, Engels and Lenin's thought on the construction of socialist society Theoretical and practical issues in the construction of harmonious society 并列题名：Theoretical and practical issues in the construction of harmonious society Research on the financial support of the construction of new socialist countryside on the study of grass-roots democracy in the construction of socialist harmonious society Social assistance and the construction of harmonious society Study on eco-environmental protection and construction of two-oriented society Study on the construction of socialist ideology 并列题名：Social assistance and the construction of harmonious society 并列题名：Study on the construction of socialist ideology