```
The two of them spoke and quickly entered deeply inside while also hiding their aura, ensuring no one could see their figures.
Fortunately, the abandoned factory provided plenty of cover, allowing the two of them to enter smoothly.
Soon, they arrived at the entrance of the factory. Just as they approached, they turned around and directly confronted the two guards at the entrance. The guards widened their eyes, trying to say something, but it was too late. Mu Chen and his companion quickly covered the guards' mouths and struck them on their necks with a palm, knocking them out instantly.
"Judging from their capabilities, these mercenaries are no simple matter!" Long Ying exclaimed in surprise.
"I'll rescue them first, then slowly get the details." Mu Chen said and disappeared with great speed.
Long Ying vanished as well, moving swiftly deeper into the abandoned factory. Upon seeing anyone, he didn't speak; instead, he knocked them out.
