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

At that instant, Tang Yue felt as though he had returned to a century ago in the era of Yuri Gagarin and Alan Shepard. The engineers had given their all to construct a launch pad weighing hundreds of tonnes and used the R-7 and Redstone rockets that weighed nearly thirty tonnes to send a payload of 70 kilograms.

That was extremely disproportionate in terms of mathematics and physics, with them spending massive amounts of resources to ultimately concentrate on such an individual.

A long period of time had passed, and during this time, humans gained the ability to build space stations, to land on the moon, and to head for Mars. However, they had forgotten that all of that once started from careful micro-steps. In the early days, liquid oxygen and ethanol engines that were sent to near-Earth orbit had a carrying capacity of fewer than three tonnes and the manned spacecraft was only two meters long.

Sol Two Hundred and Seventy-Five, Battle to Save Mai Dong