This week, the Internet was abuzz with news of TikTok's CEO, Chew Shou Zi as he went up against US lawmakers in an almost five-hour congressional hearing to prove that TikTok does not sell its data to the Chinese government, that it uses controls to protect younger users from harmful or inappropriate content and takes sufficient steps to protect the mental health of the young with controls. Over the course of the week, MARKETING-INTERACTIVE spoke to multiple industry professionals and broke down Chew's composure, how he fared against lawmakers and in the public realm, why he seemed unable to convince…