Construction, as an important producer of energy, material, and waste emissions, the high energy consumption problem has not been solved. Prefabricated buildings have become more and more popular and promoted in China in recent years. This study takes prefabricated buildings and traditional cast-in-situ buildings as research objects and divides the buildings into five stages: factory building materials production, component transportation, field installation, use, and demolition. In addition, the paper presents the calculation method of carbon emissions in five stages of construction. By calculating the carbon emissions of the two buildings in five stages, the total carbon emissions of the two buildings and the differences in carbon emissions are obtained. In particular, in this case, the prefabricated buildings and traditional cast-in-situ buildings were constructed at the same time and in the same place. It is concluded that prefabricated buildings can reduce carbon emissions by about 86 kg per square meter compared with traditional cast-in-situ buildings. In all stages of carbon emissions, the field installation stage produces the most carbon emissions. Prefabricated buildings consume more concrete, steel bar, and diesel and fewer wall materials than traditional cast-in-situ buildings.

Nowadays, the development of the world shows that building a new countryside is the only way for all countries to move towards industrialization and urbanization. Whether from the perspective of world development or from the perspective of China’s century-old villages, the development of rural agriculture is very important. Rural infrastructure construction is the key measure to promote all aspects of rural development. The purpose of this paper is to analyze the current situation of China’s rural infrastructure construction, study the factors affecting the development of rural infrastructure construction and find out the key reasons, so as to put forward suggestions on rural infrastructure construction and promote rural development. Therefore, this article uses the relevant data of China Rural Statistical Yearbook 2020 to analyze the influencing factors of China’s rural infrastructure. The article divides rural infrastructure into three levels: agricultural production infrastructure, peasant living infrastructure and rural social undertakings infrastructure, and eight indicators are selected for each level. The article analyzes the new indicators system constructed from 24 original indicators using factor analysis. According to the analysis results, the article comprehensively analyzes rural infrastructure construction situation of 31 provincial administrative regions from three levels and comprehensive indicators. Finally, the articled reaches the following conclusions: the overall development of rural infrastructure construction in Jiangsu, Shandong and Henan provinces is the best, while the rural infrastructure construction in Hainan and Ningxia Hui Autonomous Region, Tibet Autonomous Region, Qinghai and other provinces is the worst compared with other provinces.

The construction of a characteristic town is an important measure to promote the economic transformation and upgrading of China. It also promotes the coordinated and balanced development between urban and rural areas, and the construction of new urbanization and new rural areas. At present, China’s township governments are actively declaring construction projects of characteristic town. Considering the limitation of resources and funds, the government needs to choose projects with better foundation and better development prospects to invest and build, to avoid the waste of resources brought about by blind construction. Starting from the pre-selection of the construction projects of the characteristic town, taking Liaoning Province as an example, this research divided the characteristic town into four categories. Initially established the characteristic town evaluation index system blending comprehensive and multivariate index; then optimizes the index system through the statistical analysis, reliability analysis; and validity analysis of the questionnaire survey to finally obtain the selection index system of the construction projects of the characteristic town of Liaoning Province. Secondly, using the combination of Analytic Network Process (ANP) and Improved Technique for Order Preference by Similarity to an Ideal Solution (Improved-TOPSIS) method, the selection evaluation model of tourism-type characteristic town construction projects are obtained. Finally, taking the three tourism-type characteristic town projects declared by Liaoning Province as an example, using the ANP and Improved-TOPSIS evaluation model to evaluate and compare the three towns. The priority of “Xietun Town, Tanghe Town, Zhaoquanhe Town” is obtained. The result is consistent with the recommended order and verifies the applicability of the selection model. At the same time, through the feedback of the evaluation process, the current development constraints of the three towns are clarified, and the future development direction of the town is pointed out.