Study on the evolution of expressionist oil painting techniques in contemporary China 并列题名：Study on the evolution of expressionist oil painting techniques in contemporary China Study on the evolution of rural land system in contemporary China Study on the employment idea prioritizing morality in contemporary China Study of the construction of the conservation-oriented society in contemporary China A study on the construction of cultural mentality in contemporary China Study on the dominance of socialist ideology in contemporary China a study on disputes resolution in urban communities in contemporary China Study on codifaction of civil code in contemporary China a study of consumption of different classes in contemporary China