L u Di is a Chinese billionaire and a significant early investor in DJI, the world's leading manufacturer of civilian drones. He met DJI founder Frank Wang in 2006, shortly after the company's inception, and provided critical early funding. Lu's investment of roughly $100,000 at a crucial time helped stabilize the fledgling startup.

He joined the company and took on financial management roles, earning a reputation for fiscal discipline; Frank Wang once jokingly referred to him as a "penny pincher." Lu remains one of the largest individual shareholders in the privately held tech giant, which dominates the global consumer drone market. His wealth is entirely derived from this strategic early bet on drone technology.