Complex sentence: As many as 100,000 people fled to Hong Kong each month under the new regime, many of them rich farmers and capitalists who brought with them management experience, although even more were criminals who established the influential triad society in Hong Kong.
Split into simpler sentences: As many as 100,000 people fled to Hong Kong each month under the new regime, many of them were rich farmers and capitalists who brought with them management experience. Though even more were criminals who established the influential triad society in Hong Kong.