Following the Qing dynasty's conquest of South China (c. 1644–1660s), significant Cantonese migration occurred. Ming loyalists and refugees fled south by sea to escape warfare, while widespread corruption and hardship under Qing rule compelled many farmers and artisans to seek livelihoods abroad.
Maritime routes linked Guangdong's coastal communities to Siam (Thailand), Cambodia, and Cochinchina, where local rulers welcomed Cantonese traders and skilled workers for their commercial and fiscal value.
By 1700, the Chinese population in Ayutthaya reportedly exceeded 3,000. This community expanded significantly throughout the 18th century, with Cantonese immigrants becoming prominent in royal monopolies, navigation, commerce, and urban crafts.