HONG KONG — China said Tuesday it will “fight to the end” if President Donald Trump imposes an additional 50% tariff on Chinese goods as many countries rush to negotiate trade with the United States. If the plan is fully implemented, the total tariffs on goods imported into the United States from China would be as much as 104%. In response, the Chinese Commerce Ministry said China “firmly opposes” Trump’s tariff threats, calling its previous countermeasures “entirely justified.” “If the U.S. insists in its own way, China will fight to the end,” the ministry said in a statement Tuesday, adding…