During day 4 you will reach about 3.600 m. and day 5 you will pass the Nara Lagna pass of 4.580 m. Only stone marks the border crossing to Tibetan. Just after the border will pass Sher, which is the trading place for trade between the Humli and Tibetan peoples. Nepalese wood and rice is exchanged for again and salt, which is carried back by goats. Today Purang is still an important trading town in the area.
Traders come from India, Central Asia, Nepal, Tibet and China.
By the time of your visit there will be probably also are many religious pilgrims on their way to or from Mt. Kailash. You will stay the night of day 11 in a guesthouse. You can change money in Purang, but probably not traveler's cheques. Day 13 You will have the morning to walk around the town of Purang. If the day is clear you could perhaps see the Mt. Kailash.