I visited Tibet in May 2010, and we stopped by the Mt. Qomolangma base camp for a short while to admire the beautiful snow capped mountain. There is a post service station at the base camp area, hence I sent a post card home to get the post mark from such special place.
The summit of Mount Everest was the special route of the 2008 Summer Olympics torch relay. There are two post marks on this card. The red post mark is to commemorate such event, which is named "Beijing Olympics Torch Relay Qomolangma Leg". The blue one marked 'Tingri province of Tibet, EBC post office service point'.