<p>As depicted in ancient Greek mythology, Prometheus couldn’t bear the sight of humanity struggling in the darkness, crafted a long reed, and took the risk of approaching the sun to steal fire. He fearlessly brought this light to the world, defying what Zeus had ordered the gods not to do. His brave act ushered in the dawn of civilization for mankind. In this issue of “Light People”, Professor Rui Wang is invited to share stories about his adventures in improving perovskite solar cells for the full utilization of sunlight in daily lives, much like Prometheus bringing the gift of light to humanity. Perovskite solar cells hold great potential for both civilian applications and commercial purposes, such as rooftop solar panels, solar chargers, and solar-powered vehicles.</p>