I think they mean the Dark Forrest Hypothesis, which is the idea that there are loads of aliens out there, but everyone is ‘paranoid and silent’, so the starry sky is like a Dark Forrest. There’s some Chinese sci-fi book where everyone views other species as threats and kill eachother on contact.
"The star map doesn't record the coordinates of this place, which means that this place should not have been exposed to the eyes of other interstellar civilizations yet... Although it looks like this universe doesn't operate by the Dark Forest Law, I still have to be on guard against enemies who might invade at any time. There's also that Grand Duke Yinxing..."
Sci-fi · Almost Got Rich
As he was speaking, Wang Teng interrupted him. "Hmm… Help me forge a brick."
Eastern · Don't Enter The Jianghu
Behind her, a young maid in a green dress followed hastily. "Princess, please don't say that! If anyone hears us, we might as well be dead." The servant trembled as she spoke, her face turned white in fear.
Eastern · Kinoshita Nakui
See this! I just gifted the story: Ice cola
ch 40 Multi-Dimensional Algorithm
Urban · Cat's Porridge
See this! I just gifted the story: Ice cola
ch 298 Hahaha, What A Good Death! (3)
Games · Uniform Armor
O-o
"It's okay, Brother Ye. I will take care of you. You will not become a breeding machine..."
Urban · White Divine Crane
+1
"This creator's making me burst with laughter. Do you really think we don't know that it's a trash game? It's precisely because it's trash that we're playing it!"
Games · Inebriation-seeking Blue Shirt
He took two steps back in order to get a better look. Standing in front of him was a girl in a ponytail who was a full two meters tall, wearing grey sports attire. She had an angular nose, wide eyes and thick eyebrows. If all these features were on a boy, it would definitely make him look like really manly.
Eastern · Wine Pool Inebriation
<Your lifespan has increased by one year.>
Florida Man's General Store in Cultivation World
Fantasy · DamnPlotArmor