Knowledge expansion: Through this TV series, we know that he was abused by his mother when he was growing up. Even though he was admitted to the First Medical University, he was never encouraged by his mother. He is really poor, and he is claustrophobic. He is still an illegitimate child who has never felt his father's concern, but it may also be because of such growing environment and psychological pressure that he has two other personalities. The second personality, Dr. K, looks cruel because of his high IQ and his expertise in various medicine, toxicology and anatomy. The third personality turned out to be his own mother, perhaps because of the lack of maternal love.