1Analysis on coal-based industry relevance and spreading effect in NingxiaWu Lixin, Guan Shihui, Zhao Luzheng4-102Analysis of the coal market situation in the "Liang Hu Yi Jiang" area under the background of the COVID-19 epidemicLi Qingliang, Zhang Lei, Leng Jiexuan11-153Research on the impact mechanism of policy regulation on coal and electricity price linkageYu Haipeng16-214Effects of environmental regulation on green total factor productivity from the perspective of resource dependenceYan Xiao, Li Zixin22-285Analysis of Heilongjiang economic development and coal consumption dynamic change under the background of carbon neutralWang Yiwen29-346Research on the policy effect of coal resource tax reform ——Empirical analysis based on double difference methodZhang Xiaofang, Zhan Xianzhi, Zhang Yang35-407Thoughts and suggestions on development and utilization of underground space resources in closed minesLei Mingxing, Mei Canqi, Wang Nan41-458An empirical analysis of investment attraction and employment structure transformation in Shanxi ProvinceZhang Xia46-509The development trend of American coal industry and its enlightenment to ChinaSun Chao, Huang Wenjie, Gui Tianzhu51-5810Research on the Impact of Mineral Royalties System on the Coal Exploration IndustryYang Yuqian59-6411Research on the Innovation of Commercial Operation Mode of Coal Enterprise Industry Sector and Service IndustryNiu Kehong, Li Mingfu65-6912The impact of R&D investment and technical background executives on business performance ——Taking listed energy companies as an exampleWang Siwei, Hui Ju70-7413Research on Internationalized Operation Strategy of my country's Coal EnterprisesZheng Yingying75-8114Research on internal control, accounting conservatism and earnings quality ——Taking listed companies in the coal industry as an exampleFeng Taozhu, Yu Yazhuo82-88