Gao Yang recognised the voice as being somewhat familiar, and then he quickly remembered to whom it belonged. Right, that was the voice of Nate Schumacher. After meeting in Somalia, they had traveled around half the Earth, and now they had encountered each other again in South America.
Because he felt it unbelievable and was somewhat distracted, Gao Yang quickly remembered that the Angel Mercenary Corps went to Bosaso after completing their mission in the South American jungle, and Nate Schumacher had even invited him to take on a job in South America.