During the climb，Corbett took the lead，hit in the metal spikes(尖状物) that guided the ropes and climbed up.Then，after Wellman pulled himself up the rope，Corbett went down to remove the spikes and climbed up again.This process was repeated time and time again，inch by inch，for 13 days. Wellman’s job was not easy either.He got himself up the rope through upper body strength alone.In all，Wellman figured that he had done 5,000 pull-ups up the rope on the climb.