I met Biru 10 years ago when we did a long trek in Langtang and Helambu. In the last weeks we had a grat time with him and friends in the Ganesh Himal area. He’s a very good trekking guide and a very conscious and good hearted friend. I recommend for his agency Top of the World Treks if anyone wishing to trek in Nepal. Here is a sunset over Langtang Lirung 7200m from the seldom seeen N-W side. Thank you Biru!