“70 year old double amputee summits Everest.”

This has been done before, but never from the south approach. He had previously failed on four earlier attempts.

Xia Boyu, a 70-year-old double-amputee from China, was part of the first commercial squad of climbers to reach the summit of Everest on Sunday. Boyu had waited more than 40 years for this opportunity.

According to The Himalayan Times, he topped out around 7:30 a.m. local time, not long after a group of eight Sherpas finished installing the fixed ropes that provide access to the highest point on the planet. In doing so, Boyu became the first double-amputee to successfully climb Everest from the south side of the mountain.

New Zealander Mark Inglis accomplished the same feat in 2006 from the north side in Tibet.

It took Boyu more than four decades and five attempts to fulfill his dreams of climbing Everest. His first expedition to the mountain came in 1975 and led to the amputation of his legs. He was part of a Chinese team turned back from the summit due to poor weather conditions.

They bivouacked in a tent at 26,200 feet (7,985 meters) for three nights. When one team member took seriously ill, Boyu lent him his sleeping bag. As a result, he contracted severe frostbite, which eventually resulted in the amputation of his legs.

Almost 40 years later, Boyu returned to Everest to attempt the mountain once again, this time from the south side in Nepal. But the 2014 season was cut short when a pillar of ice in the Khumbu Icefall collapsed, killing 16 Sherpas. The Chinese alpinist came back for a third time in 2015, but a massive earthquake rocked Nepal, claiming the lives of hundreds of people and bringing an abrupt end to that season too.

Undaunted by his previous experiences on Everest, Boyu attempted yet another climb in 2016. Unfortunately, that expedition came up short too, with the double-amputee turning back 325 feet (90 meters) below the summit due to high winds.

Fortunately, he put everything together this year to stand atop the mountain at long last.