U.S. and Chinese negotiators have begun trade talks President Donald Trump says will help decide whether he postpones a planned tariff increase on $200 billion of imports from China. Businesspeople and economists say the two days of talks that started Thursday are unlikely to resolve a fight over Beijing's technology ambitions. They say Chinese negotiators are trying to persuade Trump they are making enough progress to postpone the March 2 duty increase. The chief U.S. envoy, Trade Representative Robert Lighthizer, and his Chinese counterpart, Vice Premier Liu He, shook hands at the start of the meeting at a government guesthouse but said nothing to reporters. Trump agreed in December to postpone further punitive duties on Chinese goods while the two sides negotiate. That suspension expires March 1.