China money >>>>> Taiwan money.
Plus South Korea like most other countries also have agreed on the one China policy, the only disagreement is on how to make it happen and when will it happen.
Actually things are a lot more complicated than that, the majority of South Korea does not agree with the policy, the politicians in the country are trying to play peace makers however right now for business reasons. Here is a fantastic article on how the situation is quite complex and also involves the US and North Korea, South Korea is just trying to avoid war with China. The main thing they agree upon is North Korea not having as much power as they do currently.