He recently had a V live to talk to his fans. He was talking about JB and Jinyoung's JJ Project as well as his upcoming solo song when a hater started spamming, "Leave GOT7 and come to China" in Chinese.
When he saw the comments, he spoke in Chinese and said, "When I do some things, a lot of people like it, but also a lot of people don't like it. Hate comments just make me stronger. To all the people who don't like me: I'm going to work harder and become stronger. Every time you write hate comments, I work harder. Thank you."
He then said in Korean, "I'm just going to work hard as GOT7's Jackson, and succeed as GOT7's Jackson. A person's mouth is their own, and you can't stop what they say. So I don't really have anything to say against that. I just have to keep working hard as GOT7's Jackson. I'll work hard and succeed."
You can see his reaction at around the 19:40 mark below.