A simple switch turns on the lights. But behind that switch is a much bigger story. Across Guangdong Province, offshore wind is driving the growth of a wider green industry cluster, from equipment manufacturing and technology testing to green power trading. With strong manufacturing capabilities and growing regional demand for clean energy, Guangdong is becoming an important hub in the Asia-Pacific's green industrial supply chain. CGTN's Yu Bokun explores how wind power is helping shape this new industrial landscape.