Read this and answer the question. If the question is unanswerable, say "unanswerable".

The overseas Chinese community has played a large role in the development of the economies in the region. These business communities are connected through the bamboo network, a network of overseas Chinese businesses operating in the markets of Southeast Asia that share common family and cultural ties. The origins of Chinese influence can be traced to the 16th century, when Chinese migrants from southern China settled in Indonesia, Thailand, and other Southeast Asian countries. Chinese populations in the region saw a rapid increase following the Communist Revolution in 1949, which forced many refugees to emigrate outside of China.

Where did migrants from South China migrate to?
unanswerable