That would mainly by the Bamar elites and maybe Rakhine. For the Karen it might be split with Buddhist Karen aka the majority joining China whiles Christians would be hostile. The Shan would most likely join if Xishuangbanna officials can persuade them. Chin, Kachin and other christians are 100% hostile to China because of Religion because they claim Christianity is part of their idenitity and are hostile to non Christians. Even though the Karen/Kayin it ironic because majority are buddhist and not Christian and the buddhist mostly sided with Tatmadaw or are neutral.