Carbon Brief: You’ve just written a book about climate policy in Chinese cities. Could you explain why subnational governments are important for China’s climate policy in general? That helps us to understand why climate policy can become durable in some places and not others. This made it one of the first regions to have full-time local officials that followed through on low-carbon policy implementation. If climate policy is not prioritised, or written into their job responsibilities, that can be a challenge for sustaining implementation.