It is way too many Chinese in Mainland China and government has no problem doing that e.g., kill them in firing squad, sending them in labor camps, harvesting and selling their organs i.e., heart, liver, lungs, kidneys, eyes, using their corps as an exhibits http://www.premierexhibitions.com/exhibitions/4/4/bodies-exhibition et cetera. It is not like the first time they killed their own people like in Tian An Men Square where students were killed by tanks running over them https://www.britannica.com/event/Tiananmen-Square-incident and during the Cultural Revolutions https://www.britannica.com/event/Cultural-Revolution.
RE: China Banning People From Transit for Bad "Social Credit" Scores