A green Belt and Road was once regarded as an empty promise of China's government to promote the initiative, but the country's practice has proved it doesn't just talk the talk, but has walked the walk. That's according to Mr. Zhang Jianyu, executive director of the BRI Green Development Institute. Since the BRI was launched a decade ago, massive changes and progresses have been made in greening the initiative. How to build a green Belt and Road? What are the challenges and solutions in this process? Zhang Jianyu shares his opinions.