Was Wang Weiguang breathing oxygen？

Was Wang Weiguang breathing oxygen? Asian trekking and Climbing Domain insisted that Wang Weiguang had an oxygen cylinder and was breathing oxygen. May I ask how to use the oxygen mask filled with ice for oxygen breathing? #Wangweiguang #Everest #abandonedbyguideonEverest #AbandonedonEverest #EverestClimbing #SnowMountainClimbing #MountainClimbing #Extremesports #Xsports #climbers #Outdoorsports #Outdoor #mountaineering #mountaineer #alpinist #trekking #altitude #motivationofguide #OutdoorAdventures #ClimbingEverestin2024 #Asiantrekking #Dawa #oxygencylinderleaking