Unfortunately, your reading comprehension can't parse basic argument, so there's not much to discuss.
For >50%, pick a manufactured finished good or intermediary good like steel, electronics, solar modules, batteries, shipbuilding, xyz components, and chances are PRC produces more than 50% of it by volume/units/tonnage, but not gross/value add. For more broad proxy indicator, look at share of global export TEUs, PRC ships out like ~50% of filled containers, OCED 20%, Row 30%. Emphasis on filled, i.e. take away empty container traffic that flows back to PRC to be filled. Hence western cope is PRC export only ~30% by gross/value (both $$$ figures) that underestimate how many sectors PRC makes more than >50% stuff in while capturing <50% in $$$. And this only considering PRC only exports 20% of GDP, i.e. a lot of manufacturing stays at home.