"Nobody is safe". That was the stark assessment a long-time China watcher gave me while discussing what's happening to one of the country's richest men, Wang Jianlin. Mr Wang, once considered a Beijing favourite, seems to have fallen foul of the establishment. His business, Dalian Wanda, grew into one of the country's most prominent property developers. And overseas it has invested heavily too, most noticeably in Hollywood - controlling the AMC cinema chain as well as Legendary Entertainment, co-producer of hit films including Godzilla and The Dark Knight Rise.