Gu Beihuai was truly baffled by the question.
Why?
His subconscious inquiry was met with Tang Chuxia pointing at the middle-aged man as she said, "He's somewhat shady!"
Gu Beihuai didn't understand why she would say that, considering he had followed her the whole time during their trip. Even though he wanted to send a letter to that man, his duty to closely protect several important figures meant he didn't have the chance to go off on his own.
Despite that, Gu Beihuai still managed to have someone deliver the letter.
When they were ready to leave, the middle-aged man approached Gu Beihuai and verified his identity.
Naturally, Gu Beihuai wasn't in a position to decide to bring the man back, but the higher-ups, after confirming the intelligence and technology the man was offering, made every effort to have him brought back.
That's how the scene of the middle-aged man being at their home came to be.
