KATHMANDU, Nepal — The Chinese mountain climber tried to scale Mount Everest almost half a dozen times.

The climber, Xia Boyu, ran into avalanches. He was turned back by an earthquake. He suffered frostbite and lost both feet.

Years later, he was diagnosed with lymphoma and doctors amputated both of his legs above the knee.

But Mr. Xia never gave up.

On Monday morning, surrounded by ice, snow and rock, Mr. Xia reached the top of Mount Everest, the world’s highest mountain, as a double amputee.