China's economic downturn is the result of multiple factors, and macroeconomic regulation is an important cause. China's macro-control policy has changed from a large-scale stimulus to maintain economic growth during the global financial crisis in 2008 to a "micro-stimulus" approach to maintain the internal dynamics of economic growth. In this thesis, we focus on the structural optimization and supply-side reform of the steel industry under the framework of macro-control. It has been found that

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... the downward spiral of China's economy is the process of industrial structure optimization, which is a necessary process for macro-control and economic quality upgrading. At present we have achieved greater milestones, but there are still many problems to be solved.