(Bloomberg) -- Taiwan will investigate whether Taiwanese firms helping Huawei Technologies Co. with chipmaking plants in China violated US sanctions, ramping up scrutiny of a company at the heart of Washington-Beijing tensions over technology.Most Read from BloombergAlmost Anyone Can Become the House Speaker, Except Donald TrumpKey Taiwan Tech Firms Helping Huawei With China Chip PlantsOzempic Is Making People Buy Less Food, Walmart SaysUS Stocks Buoyed by Big Tech Gains as Yields Slide: Markets