So I don't really believe they would go to Turkey. Moreover, Gong Jun said to travel with his parents, then I believe it must be a trip with his parents.

Hi Neil, I want to let you know that the documentary is by a scam group impersonating Zhang Zhehan, not Zhehan himself. You can find info by myself and others at the links below, and I'm happy to answer any questions.
zhang-zhehan.com/wiki/Zhang_S...
bizarrequazar.tumblr.com/post/7218681...