What it says on the tin? Make it possible for an ethnic Korean Dynasty to rule China for at least a century.
Also, although I imagine a similar situation to the Yuan and Qing dynasties i.e being absorbed by the host culture, what are the consequences of such a dynasty for China, Korea and East Asia in general?
Also, although I imagine a similar situation to the Yuan and Qing dynasties i.e being absorbed by the host culture, what are the consequences of such a dynasty for China, Korea and East Asia in general?