He has climbed to the top of several seven-thousanders (and in the case of some of them, like Communism Peak, he has successfully summited several times). He has technically climbed over 8,000 m; however, he has not successfully reached the summit of an eight-thousander. During his climb of Cho Oyu, the eight-thousander he has climbed, he went above 8,000 m, but started coming down before reaching the top.