US lawmakers worry the video-sharing platform, which is owned by Chinese company ByteDance, poses a danger to national security. The House of Representatives on Wednesday passed a bill that would force any company owned by a “foreign adversary” to divest or sell to a US-based company within 180 days in order to keep operating in the US.

Now, TikTok faces a potential ban or forced sale, and President Joe Biden has said he would sign it into law if it passes the senate.

So who’s leading the company through this turbulent period?

That would be Shou Zi Chew, TikTok’s 41-year-old CEO from Singapore, who got his start as an intern at Facebook.

Here’s a rundown on TikTok’s head honcho: