SINGAPORE – Hours spent playing computer games as a boy fuelled his curiosity about technology, eventually leading Chew Shou Zi to become TikTok’s chief executive.In a speech to Nanyang Technological University (NTU) PhD graduates on Aug 1, the Singaporean said he built his career on this curiosity, and the belief that impact often means doing things differently from what everyone expects.Chew, 43, who was born in Singapore in 1983, said these ideas started early in life, with countless hours spent on a computer his father bought when he was a child.He was speaking at the first of two ceremonies at…