The “1.4 billion flag bearer” hashtag began trending on Weibo - widely considered a Chinese-version of Twitter - after protesters in Hong Kong threw a Chinese national flag into the sea.
Five people, including four men and a woman, were arrested this week over the 3 August incident.
“On one hand, I needed to express my most basic patriotism as a Hong Kong and Chinese citizen. I am one of the flag guards,” he said.
“On the other hand, I hoped to express our collective voice through participating in such a campaign.”
Chan also said he feels "pride in being Chinese everywhere I go" and hopes Hong Kong "can return to peace soon".
The 'Five-starred Red Flag' is respected everywhere around the world," he said.
"I also deeply feel that safety, stability, and peace are just like fresh air, you never know how precious it is until you lose it."
But the actor's Beijing loyalist comments and dismissals of the democracy movement have sparked backlash on Twitter, with some Hong Kong users saying they were "heartbroken" by his statement.
“Hong Kong hates you,” wrote the pro-democracy Twitter account Hong Kong World City.
Another user replied to a clip of the interview on CGTN: “Oh good old Jackie Chan. How does the CCP pill taste like? Pretty sure you enjoyed it much eh?”.
“Shameless,” was another reply.
This is not the first time Chan has attracted criticism for his comments about the pro-democracy movement.
In 2009, he told a conference of business leaders on the southern Chinese island of Hainan that he wasn't sure "if it’s good to have freedom or not".
“I’m really confused now. If you’re too free, you’re like the way Hong Kong is now. It’s very chaotic. Taiwan is also very chaotic," he said at the time.