## 5 Discussion
Promote the effective transformation of scientific and technological achievements in PBs and enhance PBs' economic benefits and construction level [9; 62]. In the future, performance evaluation should be used to allocate R&D funds effectively, guiding them towards high-achieving transformation projects. In addition, the study proposes combining technology subsidies with talent cultivation and incorporating PB-related courses into vocational and higher education systems, which can serve as an institutional innovation for linking human resources and technology policies [63]. Finally, promote the application of new technologies, provide special subsidies for projects utilizing the latest technologies, such as \"Internet+\", \"BIM Technology\", \"RFID technology\", and \"UAV+AI technology\". Additionally, encourage the adoption of production and energy-saving technologies throughout the entire process of PBs. The promotion effect of LP on the development of PBs is not as good as the first three policies, but obtaining land use rights is the first step in developing PBs. Giving full play to the function of LP has a considerable promotion effect on improving the supply of PBs and reducing carbon emissions [10]. The government must prioritize ensuring the land area is suitable for developing PBs. Incorporate PB development into the overall national spatial planning and urban renewal strategy and promote the deep integration of land management policies and construction industrialization strategies. In land transactions, priority should be given to PBs with a high assembly rate and standardization level, and the land area planning of PB projects should be increased yearly. However, this study has not yet proposed feasible suggestions for coordinating stock and incremental land development in the land supply of PBs, nor has it fully addressed the policy implementation difficulties caused by differences in land resource endowments in different regions. FSP considers consumers and pays attention to the demand side of PBs. Improving PBs' income will directly stimulate real estate enterprises to invest in PBs. The sustainable development of PBs depends on the growth of both supply and demand. When the FSP is increased by 10%, the ideal promotion effect can be achieved, and the improvement of the FSP will not consume excessive government funds. The government can further increase the amount of provident fund loans to stimulate consumers to purchase prefabricated houses, thereby improving demand for PBs [37; 64]. Carry out effective publicity and incentives, provide consumers with a certain number of house purchase subsidies, increase the vitality of Shenyang's PB market, and jointly promote the sustainable development of PBs from the supply and demand sides [27]. The implementation effect of CPMP is average, but it will not bring tremendous economic pressure to the government. In addition, CPMP supports contractors and pre-fabricated component suppliers, playing a vital role in PBs' construction process [45]. Therefore, the government can further improve the strength and scope of CPMP. First, the conditions for a pre-sale permit should be relaxed, and the PB, whose construction quality and progress pass the periodic inspection, should be allowed to handle the pre-sale procedures. Secondly, the project with the required assembly rate shall be prioritized in the acceptance procedures. Finally, it supports transporting foreign prefabricated components, improves transportation efficiency, and reduces wear costs. Compared with other policies, PRRP has less promotion effect on the whole system. When PRRP is increased by 30% or more (more than 3.9% of the plot ratio reward), it will have a specific promotion effect. The low level of PRRP will not significantly affect the development of PBs. If the PRRP is increased too much, it will affect the living experience of consumers.