Wu Yajun is the world's richest self-made woman, worth an estimated $9.4 billion, according to Forbes.

The Chinese billionaire started out making $16 in a factory and made her fortune after founding the real-estate-development company Longfor Properties in the early 1990s with her husband.

She stepped down as chair of her company in November and handed her shares to her daughter.

Wu Yajun once worked in a factory for $16 a month. Now, she's the world's richest self-made woman, worth $9.4 billion, according to Forbes.

The Chinese billionaire spent years working in a factory and as a journalist before founding Longfor Properties, a real-estate development company that brought in $10.7 billion in revenue in 2017, according to Bloomberg.

Wu stepped down as Longfor's chair in November and transferred her shares to her daughter, Forbes reported.

Here's how Wu went from working as a factory technician to amassing an $9.4 billion real-estate empire.