It is believed when the sacred planet Venus appears in the sky, the water in the river becomes purest and cure diseases. During its appearance for one week in the sky, all the people in Tibet go into the river for bathing. Long long ago,when Tibet was in danger of large scale invasion, the Kongpo people sent out an army to defend their homeland. It was in September and the soldiers worried that they might miss the New Year,highland barley wine and other good things. So people had the Tibetan New Year on 1st October ahead of time.
Kongpo people present three sacrifices an stay up at night from then on.
And now it has become the Kongpo Festibal for entertainment like Kongpo dancing, horse race, archery and shooting.