Complex sentence: The seven major groups are Zomi, Asho, K'cho, Kuki, Lai, Lusei, and Mro/Khumi, therefore, the Chin people are not only those who inhabited the Chin Hill or Chin state.
Split into simpler sentences: The seven major groups are Zomi, Asho, K'cho, Kuki, Lai, lusei and Mro/Khumi. Therefore, the Chin people means not only those who inhabited in the Chin hill or Chin state.