So I've imported my game on from EU4. I'm now playing united India and things were going pretty well. I've united the sub continent. Australia, california, Alaska and Colombia are my colonial puppets and I also rule Indonesia, Philippines and most of east Africa as well as the suez canal.

In EU4 I had a few flags with China as I colonised Taiwan and other islands. I also rule some of manchuria and East Russia as didn't want Russia reaching the sea. However I managed to hold them at bay and leave them with high devastation scores which kept them busy for many decades.

On importing into vic 2 however they are now westernised as I did it based on institutions as didn't want to have to westernise myself as the major global power and tech leader.

They have quickly rocketed to the top power and now in 1850 have a higher score than the next 5 nations combined. I'm second but the gap is huge and growing. They declare war regularly to claim manchuria. So far I've used the mountains on my border and forts to good effect. I can normally get them to around -20 war score by defending the border and stomping their first few armies before the full reinforcements arrive to crush me. I've managed to release a few small nations like Burma this way and then trying to keep them sphered to protect them.

This is making very small dents in their empire though while it continues to industrialise at an ever growing rate outpacing everyone else. Is there anything I can do to stop their almost inevitable rise to absolute power by the end of the game or port into hoi4?