China China’s iron and steel industry FACTS devices Gompertz model Q1-390 QC1-999 SWOT analysis a two-stage dynamic game asymmetry bioenergy technology building energy efficiency carbon emission coal supply chain coordinated control corn market crude oil market damping controllers dynamic efficiency of public policy electricity fluctuation emission reduction mechanism research export performance fuel demand inter-regional product yield selection mining city panel data approach price discovery recurrence interval analysis risk estimation robustness rural area