Facing questions about harmful acts allegedly prompted by TikTok posts, Chew said he supports continued liability protection for social media platforms as a means of protecting free speech.

Liability protection, stipulated in Section 230 of the 1996 Communications Decency Act, safeguards social media platforms and other sites from legal responsibility that could result from content posted by users.

“[Section] 230 has been very important for freedom of expression on the internet,” Chew said. “It’s one of the commitments we’ve made to this committee and our users.”

“I do think it’s important to preserve that,” he added.

Hours before Chew began testimony on Thursday, China said that a sale of TikTok by China-based parent company ByteDance would require the approval of the Chinese government, the Wall Street Journal reported.

At the hearing, lawmakers asked Chew about the report.

"Despite your assertions to the contrary, China certainly thinks it is in control of TikTok and its software," said Rep. Michael Burgess, R-Texas. "Is that not correct?"

Chew replied, "TikTok is not available in mainland China, and today we're currently headquartered in Los Angeles and Singapore."

"I'm not saying that the founders of ByteDance are not Chinese, nor am I saying that we don't make use of Chinese employees, just like many other companies around the world," he added.

In an early exchange, Chew faced repeated questions about TikTok’s relationship with the Chinese government and alleged content moderation on its behalf.

Rep. McMorris Rodgers asked Chew about a process known as “heating content,” in which a social media promotes or moderates posts that appear on its platform.

“In your current or previous positions in Chinese companies, have employees engaged in heating content for users outside of China?” McMorris Rodgers asked.

“Our heating process is approved by our local teams in various countries,” Chew responded, noting that potentially controversial content, such as posts about the 1989 Tiananmen Square Massacre, is currently present on the app.

McMorris Rodgers appeared to doubt the veracity of the remark, saying, “I will remind you that making false or misleading statements to Congress is a federal crime.”

Chew addressed lawmaker concerns over data safety and content manipulation in opening remarks, emphasizing steps taken by the company to protect user data.

Chew touted Project Texas, an ongoing effort that he says keeps all data on U.S. users within the country through a partnership with Austin-based cloud computing company Oracle.

“Trust is about actions we take,” Chew said. “We will firewall protect the U.S. data from unwanted foreign access.”

“TikTok will remain a place for free expression and will not be manipulated by any government,” he added.