Guiyang's excellent and good air quality rate in 2021 was 98.9 percent, meeting China's national second-level standard.

The main export products included oxyamino compounds, steel, and freight vehicles; and the main imported commodities were copper ore, milk and cream, logs and potash fertilizer.

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Chen also outlined a series of goals to achieve in terms of green transformation across raw material industries by the end of 2025.

"Steel is a key foundation industry and it is absolutely essential that it receives practical support from the government," he said.