On April 16 episode of KBS' television show 'Hits Song', HeeChul talked about his past.
![HeeChul](https://img.sbs.co.kr/newimg/news/20210419/201542116_700.jpg)
HeeChul said, "Well, I used to smoke back then, and that is something that I really regret doing."
He continued, "I smoked so much that I completely damaged my bronchial tubes. They don't function well anymore."
![HeeChul](https://img.sbs.co.kr/newimg/news/20210419/201542117_700.jpg)
HeeChul said, "I can't even have hot soup anymore. It's all because I smoked too much."
He added, "It's been over 10 years since I've stopped smoking now. If I could go back in time, I would never start smoking."
![HeeChul](https://img.sbs.co.kr/newimg/news/20210419/201542118_700.jpg)
(SBS Star)