First Thing: TikTok CEO questioned on China concerns at landmark hearing

Good morning. The chief executive of TikTok, Shou Zi Chew, was forced to defend his company's relationship with China, as well as the protections for its youngest users, at a testy congressional hearing on Thursday that came amid a bipartisan push to ban the app entirely in the US over national security concerns. The hearing marked the first appearance before US lawmakers by a TikTok chief executive, and a rare public outing for the 40-year-old Chew, who has remained largely out of the limelight as the social network's popularity soars. TikTok boasts tens of millions of US users, but lawmakers…