C301 Confusion

I asked him what he could do.

He said that in the part of India where the Pamir Plateau and the Tibetan Plateau were connected, there was a place called Plain, which belonged to the border regions of China, India, and Nepal, specifically Nepal, where there was a team of explorers who spent most of their time on the Pamir Plateau and the Tibetan Plateau at the border of the three countries