[1] His debut occurred in 1975 after he won the Hanguk Ilbo daily comics contest.

[3] In 1995, Kim Soo-jung established a company named Dooly World and went into the character design industry.

On April 22, 2013, Google Korea's doodle featured Dooly, his enemy Kildong, and his friends Douner, Ddochi and Heedong.

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