After leaving North Korea, Kang Cheol-hwan became the founding director of the North Korea Strategy Center, a nonprofit organization in Seoul, preparing North Korean defectors for leadership roles after reunification.
Kang Cheol-hwan is also the author of a book entitled The Aquariums of Pyongyang about his experiences in North Korea. "Earthquakes in China and tsunami in the Philippines, these are disasters that are visible and people help these visible disasters. But in North Korea, there are invisible homicides and harassments. … I wanted to tell the story through the book and tell it to the world and how the harassment and human rights abuse is being conducted in North Korea," he said.
Kang says it is important to educate and prepare South Koreans and even Korean Americans for the inevitability of a unified Korea.
Katy Oh, a senior fellow at the Brookings Institution, agrees. "All human beings are the same. They all pursue the same important traits in life, such as freedom and happiness and pleasure and good health. And so if this universal rule is applying to every human being, I say you can learn the lessons from any divided country with a bloody past," she said.