SEOUL, Oct. 9 (UPI) -- Korea Zinc said a memorial service for its honorary chairman, Choi Chang-geol, will be held Friday. He died Monday at age 84. Born in Hwanghae Province, now part of North Korea , in 1941, Choi moved to Seoul with his father, Korea Zinc co-founder Choi Ki-ho, and other family members after Korea's liberation from the Japanese colonial rule in 1945. He studied economics at Seoul National University and earned a master's of business administration from Columbia University in