Percy Jackson and the Chinese Demigods

Percy was finally living as normal a life as a demigod can beg for. Finally, after the defeat of Gaia, he could rest and finally relax after years of doing the gods dirty work.
Of course, it immediately went downhill from there.
Two random kids fall on Percy from a random portal and instantly put him and every person in Camp Half-Blood in danger. Now he had to figure out a way to get them back home.