Gao Yang didn't want to tell his father that he was now a mercenary and cause his parents any more worry, so he told his father a kind-hearted lie.
However, when Gao Yang said that his money was earned legitimately, it wasn't entirely a lie; money earned risking one's life can at least be considered legitimate, right?
Gao Yang didn't speak with his parents for too long. Although the call was secure, making it had required Wolfgang to break some confidentiality rules, so Gao Yang kept it short and sweet. He assured his parents, while also briefly inquiring about the legal troubles he was in. Most importantly, Gao Yang finally had the chance to give his Swiss Bank account number and password to his parents.
The call with his parents lifted a heavy burden from Gao Yang's heart. At least now he knew that even if he died in battle, he wouldn't have to worry about the bank profiting from his money and his parents living in poverty.