Diplomats from 38 countries are in Guangdong Province this week, exploring the latest examples of China's modernization drive. They began in the provincial capital of Guangzhou and moved on to Foshan and Shenzhen. Throughout the journey, the diplomats are asking an important question: How does China's modernization benefit the world? In particular, how manufacturing hubs like Guangdong use green energy to fight climate change. One such solution is in Foshan, a pioneer in hydrogen fuel cell technology, used in industrial manufacturing and transportation. Officials also witnessed urban trash being turned into electricity at a smart waste incineration plant. This week's tour marks the beginning of talks that could bring China's sustainable innovations to more global cities in the coming years.