Facts: - weight: bantamweight - draws: 0 - losses: 12 - height: 5 5 - ko: 50 - style: southpaw - realname: chaiya pothang - total: 87 - birth date: 1 november 1976 - name: ratanachai sor vorapin - nationality: tha thai - birth place: dankhuntod , thailand - wins: 75 Based on these bullet points, write a short biography describing the life of ratanachai sor vorapin .
A:
ratanachai sor vorapin is a professional boxer and a former wbo bantamweight champion .he is the younger brother of ratanapol sor vorapin , a former ibf strawweight champion .