https://apnews.com/9b4f51210bce4d10a08b3d82e83b209b > BEIJING (AP) — China announced it filled a World Trade Organization challenge Monday to U.S. President Donald Trump's proposal for a tariff hike on $200 billion of Chinese goods, reacting swiftly amid deepening concern about the economic impact of their spiraling technology dispute. > The one-sentence Commerce Ministry statement gave no legal grounds for the challenge or other details. It is an unusually rapid move for a trade case, coming less than one week after the U.S. Trade Representative announced the tariff plan, which wouldn't take effect until at least September.