Roughly the same as "Germanic Roman", a sinocised ethnic mongol.
When a "culturally inferior" nation captured another one, especially one with a much larger population base, the conquerer usually picked up traits, concepts and other things from the conquered, if the difference was a great as between the Mongols and the Song, the conqueror may even consider himself to be "a new kind of Chinese/Roman" after a while.
The same happened when Germanic tribes took over the western Roman Empire, they founded their own Yuan dynasty look a like thing, the "Holy Roman Empire of the German nation"(although it was not called like that until a millenia later) as a successor to the former roman Empire, something the "true Romans" of Byzantium (nice northern Song/ Southern Song analogy here) were fairly pissed about.
Actually, Germans were to the Romans what the Xiognu or Mongols were to the various Chinese dynasties, the only difference beeing that the "Italians" never were able to get back to beeing the rulers.
When a "culturally inferior" nation captured another one, especially one with a much larger population base, the conquerer usually picked up traits, concepts and other things from the conquered, if the difference was a great as between the Mongols and the Song, the conqueror may even consider himself to be "a new kind of Chinese/Roman" after a while.
The same happened when Germanic tribes took over the western Roman Empire, they founded their own Yuan dynasty look a like thing, the "Holy Roman Empire of the German nation"(although it was not called like that until a millenia later) as a successor to the former roman Empire, something the "true Romans" of Byzantium (nice northern Song/ Southern Song analogy here) were fairly pissed about.
Actually, Germans were to the Romans what the Xiognu or Mongols were to the various Chinese dynasties, the only difference beeing that the "Italians" never were able to get back to beeing the rulers.