Choi Siwon, a member of popular K-pop boy band Super Junior, was forced to apologize twice after liking a post on Twitter by South Korean newspaper The Chosun Ilbo about the Hong Kong protests.

Twitter is blocked in China, but opinions that rile Beijing regularly make their way across the “Great Firewall” of censorship and go viral on Chinese social media.

Choi apologized on China’s Twitter-like Weibo platform Sunday night, saying he hoped there would soon be an end to “the violence and chaos” in Hong Kong.

“Since the controversy caused by this behaviour makes you all feel disgusted and disappointed, I express my sincerest apologies to all of you,” he wrote on his Weibo account, where he has 16.5 million followers.

Choi also unliked the Twitter post.

He apologised again on Tuesday, writing on Weibo he felt “really sorry for my wrong behaviour on Twitter recently, which has made everyone feel disappointed and hurt everyone’s feelings.”

“I have never denied…Hong Kong is an integral part of China!” he wrote.