A study looked at how a carbon tax in Guangdong Province could affect the economy and environment. They used a model to see how different tax rates would impact GDP and carbon emissions. They found that a tax of 100 yuan per ton would only slightly decrease GDP, but could reduce emissions by millions of tons. They suggest a tax of 10-40 yuan per ton for Guangdong and recommend a stepped tax approach for flexibility. The study shows that a regional carbon tax can help reduce emissions without major effects on the overall supply chain emissions in China.