I remember some scenario on some dead site about succesfull Taiping who win over half of China,pulled Meji,Manchu did the same,and we have two modern china states as a result.Werll,till one conqered other after WW2.
This.And England would attack it becouse of opium,and other european powers for their own reasons.Althought...if they leave army and economy to provessionals,and take USA alliance with becoming more protestant-like,then they could hold.