There was some controversy over his sudden reversal of retirement, but his first Solo album Seo Tai Ji sold more than a million copies, even without any promotion in Korea.
Ada beberapa kontroversi mengenai pembalikan tiba-tiba pensiun, tetapi album solo pertamanya, "Seo Tai Ji" terjual lebih dari satu juta kopi, bahkan tanpa promosi di Korea.