Complex sentence: Starting today, a new policy regarding Vietnamese boat people had been implemented in Hong Kong; from now on, those boat people from Vietnam seeking to immigrate into Hong Kong as immigrants, due to economic reasons, will be considered illegal immigrants.
Split into simpler sentences: Starting today, a new policy regarding Vietnamese boat people had been implemented in Hong Kong. From now on, those boat people from Vietnam seeking to immigrate into Hong Kong as immigrants due to economic reasons will be considered illegal immigrants.