To become wealthy and prosperous, often by starting a successful business or through hard work.
发展家业，使家庭变得富裕起来。
魏巍《东方》第三部第一章这个村子里的‘大能人’，更关心的却是个人的发家致富。”
After years of hard work, she managed to get rich and start a new life.
Learn the next connected idiom: 发家致富 (fā jiā zhì fù) → 富丽堂皇 (fù lì táng huáng)
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