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

Tang Yue didn't know where Tomcat had hidden the petri dish away. It might even have thrown out all the bacteria, allowing those microbes to fend for themselves in the harsh Martian environment. Under normal conditions, this was a contamination of the environment, but no one cared anymore.

Whether the mutated bacteria could really evolve into Martian amoebas was left up to fate.

"How much longer before Tianzhou arrives?" Tang Yue slumped on the table as he pressed on the keyboard again and again in a listless manner.

"140 hours," Tomcat replied. "In the past three sols, you have asked this question 167 times. That was the 168th time."

"How much longer can the space station last?"

"I've no idea," Tomcat replied. "Perhaps an hour, or maybe 150 hours. You have asked this question equally as many times as the last one."

Sol Three Hundred and Twenty-Six, Rescue Failed