China has ordered its airlines not to take any further deliveries of Boeing Co. jets as part of the tit-for-tat trade war that's seen US President Donald Trump levy tariffs of as high as 145% on Chinese goods.

It was China that first grounded Boeing's 737 MAX jets after two fatal crashes in 2018 and 2019 killed nearly 350 people. China also suspended most orders and deliveries of the jet in 2019.

Alain Sherter is a senior managing editor with CBS News. He covers business, economics, money and workplace issues for CBS MoneyWatch. A Boeing aircraft that was set to be delivered to an airline in China returned to the U.S. over the weekend, a sign of the emerging trade war between the world's two biggest economies.