Nims Purja is looking to complete a fourth mountaineering world-record (Picture: Nims Purja).
A former Gurkha and Special Forces soldier is closing in on a record-breaking attempt to climb the world's highest peaks.
Nirmal 'Nims' Purja set out to climb the world's 14 highest mountain peaks in just seven months.
He is on course to smash the current record of seven years, 11 months and 14 days.
Mount Shishapangma, in Tibet, is Mr Purja's 14th and final peak.
Mr Purja and his team faced delays before taking on the 8,027-metre-high mountain as they waited on a permit from the Chinese government.
Earlier this week, Mr Purja shared an update on his Facebook page, saying he was "having massive trouble" with his wisdom tooth.
He said he hopes the high altitude on the climb will "supersede" the pain.
All of the mountain peaks that make up the 'Project Possible' challenge stand at more than 8,000m and are found in the Himalayas.
Mr Purja is expected to reach the top of Mount Shishapangma on Monday or Tuesday.
At the start of Mr Purja's challenge in May he helped rescue a climber on Mount Annapurna who was left stranded for two days after falling ill.
During his ascent of Mount Everest, the world's highest mountain, Mr Purja took a picture of a traffic jam at the top of the mountain.
The picture went viral, amid concerns too many people were scaling the peak, making it even more dangerous.