Tian Rui Shuo Fu

Payload specialist, Tang Yue, who is a mechanical and electrical engineer by training, is left stranded on Mars when he receives news from his AI robot assistant, Tomcat, that Earth has exploded. He believes himself to be the last human in the Universe.
Turns out, he is only the last man in the Universe. Botanist, Mai Dong, had been left on the United Space Station (USS) orbiting Mars, to await Tang Yue's ascent to the USS before they make their journey back to Earth. But now, it's impossible.
Join the trio's quest for survival as they attempt to unravel the mystery of Earth's disappearance.

Dead on Mars

CKtalon

"Mr. Cat, the straight-line distance between you and the Chelomey probe is 32.78 kilometers." Mai Dong observed the number on the screen. "You are still right on target."

"Straight-line distance of 32.78 kilometers? But the actual distance is probably far greater than 30 kilometers. I believe a detour is needed next."

Mai Dong and Tang Yue were stunned.

"Detour?" Tang Yue got up and typed on the keyboard, and send an inquiry by email. "Is something blocking your path?"

Mai Dong asked as well: "A sand dune?"

"It's a sand dune, one that just extends endlessly. I've parked the Mars Wanderer at the bottom of it to charge. The sand dune's slopes are too steep, and they are about one- to two-stories tall. I don't think the Wanderer can climb over it, so a detour is needed."

Sol Hundred and Six, Second Sol After Tomcat's Departure