<p>➀ The expansion of TSMC's fabs in Arizona raises concerns in Taiwan about the potential loss of its 'Silicon Shield';</p><p>➁ TSMC has assured Taiwan that it will maintain the most advanced technology in Taiwan and that the foreign fabs are not the most advanced;</p><p>➂ The Taiwan government's approval is required for TSMC's foreign investments above $45.5 million.</p>