Upgrade (2)

"Feng! Are you alright? Where are you right now?" Satella was a little flustered and nervous when she received a call from Zhang Qin Feng out of nowhere. Furthermore, the call came while she was clearing the zombies from getting closer to the base.

"Continue with what you're doing!" Satella ordered before she retreated to the back to speak with Zhang Qin Feng.

"Had you come out from the base? Where are you right now?" Satella inquired. She was worried that Zhang Qin Feng came out from the base on purpose to look for her.

Because from what she knew, the communication signal between them can be differentiated into a few channels. The standalone channel was commonly used within the base, while the operation channel is for the outside team.

Unless Zhang Qin Feng came out and connected to the Operation Channel, it would be impossible for him to get in touch with Satella.