Brazilian c-4 visa and brazilian passaport.

Hello me and my girlfriend are planing to travel to china again in april,we just came from there in january,we hold the brazilian passaport,i got the C4 and my girlfriend doenst have it,the last 2 visas we did to china one it was in brazil and the other one in harbin.
We can get it now in seoul?for 2 months?

thanks.