* ActingForTwo: Creator/DavidChiang, who plays the protagonist Hsi Ching also plays his own ancestor in the flashback.
* ActorSharedBackground: Vanessa is said to be Scandinavian. Her actress Julie Ege was indeed from Norway.
* BadExportForYou: The film was not released in the US until five years later, with seventeen minutes cut, and re-edited as 'The Seven Brothers Meet Dracula'. This version also has a messy edit of the opening sequence, and several scenes that repeat shots over and over (one involving a zoomed in shot of Mei smiling at Ching to look like a close-up).
* CreatorBacklash:
** Director Roy Ward Baker later called the film "an absolute failure", lamenting that no one on the production knew what they were doing.
** John Forbes-Robertson was furious when he found out Hammer had dubbed his voice with David de Keyser.
* DirectedByCastMember: David Chiang helped direct some of the action scenes, due to Roy Ward Baker's lack of experience with martial arts films.
* FollowTheLeader: The film was Hammer's attempt to cash in on the martial arts craze popularised by ''Film/EnterTheDragon''.
* FranchiseKiller: The film marked the end of Hammer's Dracula series. There was a planned sequel to be titled ''Kali, Devil Bride of Dracula'', which was to be filmed in India, but it was never made.
* HostilityOnTheSet: Tensions ran high between the two crews, the British thinking the Chinese incompetent and the Chinese thinking the Brits arrogant.
* InternationalCoproduction: The was a co-production between Hammer and the Creator/ShawBrothers Studio.
* TheOtherDarrin: Creator/ChristopherLee was offered the role of Dracula, but he turned it down after reading the script, and was replaced with John Forbes-Robertson.
* ReferencedBy: In the ''Literature/FightingFantasy'' book ''Literature/LegendOfTheShadowWarriors'', the titular villains look incredibly like the Golden Vampires in this film.
* StarDerailingRole: Creator/ShihSzu had become notable for her roles in wuxia and martial arts films in the 70s, and Shaw were hyping her up. The failure of this film saw her reduced to supporting roles for the rest of the decade, and ultimately seeking work outside the Shaw studio.
* TroubledProduction: It was only when the Hammer crew arrived in Hong Kong to film that they found out almost none of the Golden Harvest studio's crew spoke English - also not knowing that the standard practice was to film silent and dub the sound in later (due to constant noise and traffic). Peter Cushing was also still grieving for his deceased wife, meaning he was practically "catatonic" for the duration of production. The temperatures were so high that crew members would often have to go shirtless under the intense heat. Creator/ShawBrothers also were not happy with how Roy Ward Baker was directing the film, resulting in martial arts scenes being choreographed by one of their studio's directors and a second unit being helmed by Chang Cheh. The latter also added scenes that extended the Eastern version of the film to 110 minutes. Roy Ward Baker also struggled to find a green field to use as a backdrop for one key scene, and the eventual location found at the Chinese border still had a modern city in the background (limiting the camera angles that could be used). In an interview in the late 90s, he described the filmmaking process as "a nightmare".
* VacationDearBoy: Peter Cushing stayed on board with the film, despite Christopher Lee trying to convince him to walk, because he'd hoped that visiting China to shoot might help him cope with grieving for his wife's death.
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