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In China, photovoltaic industry has developed rapidly in recent years, and distributed photovoltaic power generation projects account for an increasing proportion of the overall photovoltaic projects. Distributed photovoltaic power generation projects are facing many problems after the “531 New Deal”. For example, small and medium-sized photovoltaic companies are facing difficulties in financing, market-oriented transaction mechanisms need to be improved, related technologies need to be further improved, and the development and approval process is relatively cumbersome. Innovative financing methods are required, Multi-channel financing, through policy support, promoting system reform, increasing technological innovation, and integrating with other industries to seek further development.

Since Fuzhou started garbage sorting, it has achieved certain results. However, there are still many problems in the specific implementation process. Starting from the analysis of the status quo of domestic waste classification in Fuzhou City, the article analyzes the main problems existing in the current domestic waste classification work in Fuzhou, such as residents' awareness of waste classification needs to be improved, waste classification hardware facilities are not perfect, etc., and on this basis, corresponding The countermeasures will play a positive role in further promoting the garbage classification in Fuzhou.

The effects of (C, N, S, P)/V co-doping on the electronic structures of indium niobate have been investigated by the first principle calculations based on density functional theory (DFT). The results indicated that some localized V 3d states emerged under the bottom of conduction band (Nb 4d states) along with the existence of localized C 2p (N 2p, S 3p) states above the top of valence band (O 2p states) for C (N, S)/V co-doped InNbO4. As for P/V co-doping, the introduced P 3p levels in the band gap were conducive to cut down the electron transition energy. Moreover, the hybridization of localized V 3d and Nb 4d states contributed to the reduction of band gap energy. According to the calculated results, we tentatively proposed that P/V co-doped InNbO4 would possibly be a promising visible-light responsive photocatalyst in view of the suitable redox potentials of water splitting.