The conversation between human and AI assistant.
[|Human|] Why was Tingri important for Nepalese people based on the following text?
[|AI|] Tingri was used as a trading post by Sherpas from Nepal as a means for exchanging rice, grain and iron in return for Tibetan wool, livestock and salt.
[|Human|] 
Why was Tingri important for Nepalese people based on the following text?