First and foremost, Ling Zhenfei already knew earlier that those people had a conspiracy against him.
Ling Zhenfei tricked that person, saying he wouldn't go.
As a result, just about thirty minutes later, Luo Juan called, meaning to urge Ling Zhenfei to return quickly.
If all this comes together, it's quite clear; it's obvious that someone wants Ling Zhenfei to go to the Provincial City today.
There's definitely a conspiracy in the Provincial City regarding Ling Zhenfei, but Ling Zhenfei doesn't know what the conspiracy is yet.
Even when Luo Juan called earlier, Ling Zhenfei didn't tell her he would definitely come back today.
At this point, Ling Zhenfei had already figured it out: he must go back.
Ling Zhenfei thought since someone wants him to return, they must have prepared a conspiracy.
If he returns openly, or if he goes back without any preparation, he surely would fall into their trap.
