As he spoke, Andrew installed a spare carbon dioxide absorber.

After restoring all the equipment, Andrew said again, "Joey, turn on the air circulation system and see if it works properly."

A few minutes later.

There was no response.

"Joey?"

Andrew's eye twitched slightly, and he spoke again, "Joey, are you there?"

The next moment, a panicked voice rang out in the headset inside the helmet!

"Damn it... Andrew, the air circulation is still not working properly!!"

"It's the same problem! The carbon dioxide absorption device is malfunctioning!"

Andrew's heart sank.

Could it be that Martian dust has already penetrated the equipment?

He took a deep breath and said calmly, "Joey, don't panic."

"It's possible that the replacement device is also broken. I'll try another one."

...

Having learned from the previous experience, Andrew's replacement this time was significantly faster.

Half an hour later.

"Joey, restart the air circulation system!"

A few seconds later, Joey's voice came through, trembling with tears.

"Andrew, it still doesn't work!"

"Carbon dioxide absorber malfunction!"

Hearing Joey's words, tinged with sobs, Andrew's heart sank lower and lower in the water, like a stone sinking deeper and lower.

Andrew's hands trembled slightly as he disassembled the air circulation device again.

This time, he raised his flashlight and carefully checked for the fault.

When a hidden gap and a fist-sized, crimson rock appeared before him, Andrew held his breath instantly.

It's over.

These two words flashed through his mind.

"Gentlemen, we may be in trouble."

Andrew took a deep breath and said in a solemn tone.