Found this while doing some searching on the net. He is from Louisiana.
"" Savannah Republican, June 24, 1863, p. 1, c. 2 - A Celestial Among Us.—Among the prisoners received at the Libby recently is Ching-Chang, or, in English, China Hague, a member of the Second Louisiana (Yankee) regiment, taken near Port Hudson. Chang wears a cue of respectable length, and the first enquiry he made after his entry was in regard to the supply of rats to be obtained. As the Libby is overrun with them, Chang anticipates a good time. ""