It’s more a semantic argument than anything else. They’re not disputing where the probe landed, but what counts as the polar region on the moon. India says the probe is far enough south that it would be considered in the polar regions if it was on earth. The Chinese guy says nuh-uhh, the moon’s axis is less tilted than earth so it’s polar region is smaller. I think he’s got a point, but it’s kind of a boring one.