International travel (Delhi - Guangzhou - Los Angeles) - need terminal info

Hi, my dad is traveling first time and ciming to USA first time via China. I could not find gate information. He is traveling on China southern airlines. Usuakly which gate or concourse is used by CZ? How far does someone need to wakj to gi to another gate and catch Los Angeles flight after getting down from Delhi flight. Thanks in advance fir reading and answering my question.