W u Lanlan is a Chinese heiress whose family controls Jiangsu Yuyue Medical Equipment & Supply, a leading domestic manufacturer of medical devices. She is the daughter of Wu Guangming, the company's founder and chairman. Her father has built the company into a major player in the Chinese healthcare market, with a wide range of products that are used in both hospitals and for home care.

The company's portfolio includes respiratory equipment like oxygen concentrators and ventilators, blood pressure monitors, and other medical supplies. The company's business saw a massive surge during the COVID-19 pandemic due to the high demand for its respiratory products. While her father is the founder and leader of the company, Wu Lanlan holds a significant stake in the publicly traded company, which is the source of her billion-dollar fortune.