The Chinese kill squad had Lucas’ photograph. Why?
They did not actively try to kill him or press information from him except indirectly through Vaughan.
But would I need a kill squad for that?
What information did the Chinese have, to know about the hold Vaughan had over Lucas / John, when even MI-5, after vetting him and the close work connection he had with Harry, was without an inkling of what really was going on?
What still bothers me is, that Lucas had Chinese figurines in his flat in series 8. Why did the scriptwriters not make more of a connection here and give these hints some meaning? As it is they are only random puzzle parts left behind and forgotten on a carpet, where you never will find out how the whole puzzle should have looked like.