THE first Boeing 737 MAX jet delivered to a Chinese airline since March 2019 landed in China last Saturday, ending an almost five-year import freeze on the planemaker’s most profitable jets and heralding the potential delivery of a backlog of dozens of finished MAXs to China. The 737 MAX 8 left Seattle Boeing field in Washington state on Wednesday after being handed over to China Southern Airlines, stopping in Hawaii and the Northern Mariana Islands before its final leg to Guangzhou in southern...