In order to keep their whereabouts hidden from Mu Feichi, Yan Shuo would make sure that each call they made was just before they got in the car to leave for the next stop.
Hearing that Mu Feichi had not ordered anyone to search for them, Yan Shuo was a little skeptical. He was extremely careful in the selection of their locations.
After being through the extreme heat and cold, Yan Shuo chose the tropical rain forest, which was completely out of their country, for their last stop. It was here that they would do actual in-the-field survival training.
After leaving the mountains, they headed to Country S using the passports they had gotten from his special connections.
...
Three months passed in the blink of an eye. Mu Feichi had already completed his military exercises. He was then sent on a mission put together by the United Nations.