June 5 is World Environment Day. Carbon is one of the keywords in 21st century environmental issues. China has made bold commitments to peak its carbon emissions by 2030 and become carbon neutral by 2060. On one hand, China has been ramping up renewable energy to reduce carbon emissions as much as possible. On the other hand, China's eco-compensation system contributes a lot to mitigating climate change. What's special about the eco-compensation system? How can it help China's greener development? In this episode of Unboxing China, CGTN's Liu Xiaoxian unpacks this policy toolbox.