(Bloomberg) -- Apple Inc.’s Chief Operating Officer Jeff Williams is on a rare visit to Taiwan to celebrate the 50th anniversary of Foxconn, the company that helped build the iPhone empire by assembling those devices to exacting standards in factories across China.Most Read from BloombergLargest Covid Vaccine Study Yet Finds Links to Health ConditionsCapital One to Buy Discover for $35 Billion in Year's Biggest Deal Amazon Deserves to Be Called Out for Swindling UsersA $6 Trillion Wall of Cash I