After graduating the Winter school 2, students take Final KChO. It is held on January or February. It is divided into two parts; Theories and Experiments. Organic Chemistry and Inorganic Chemistry questions in the theory are important for choosing the representatives. In the experiment, students solve one Organic Chemistry experiment and one Quantitative Chemistry experiment. Four students who got a high score represents South Korea in IChO. If all the four representatives are the same gender, the student who got a highest score between the other gender who ranked eighth or higher becomes the representative instead of the fourth student.