After seven years working in the shadows, He Tingbo stepped back into the limelight last month.The head of Huawei Technologies’ secretive semiconductor business – widely dubbed the company’s “chip queen” – had been out of the public view since 2019, when Washington severed the Chinese company’s global access to advanced technology, including semiconductors.Her retreat into the background became a symbol of Huawei’s battle for survival. That all changed last month on a global academic stage in...