Question: What is the name of the largest film production company of Hong Kong that produced "Return of the One-Armed Swordsman"?

Context articles: The New One-Armed Swordsman
Cliff Lok
Run Run Shaw
Saga Studios
Zatoichi and the One-Armed Swordsman
Return of the One-Armed Swordsman
One Armed Swordsman Against Nine Killers
Shaw Brothers Studio
One-Armed Swordsman
Jimmy Wang (actor)

The New One-Armed Swordsman, also known as Triple Irons, is a 1971 Hong Kong "wuxia" film directed by Chang Cheh and produced by the Shaw Brothers Studio, starring David Chiang.
 Chiang replaced Jimmy Wang, the star of the two preceding films in the series, "The One-Armed Swordsman" and "Return of the One-Armed Swordsman".
 The film features Chang Cheh's usual brand of violent swordplay and bloody effects.
Cliff Lok, also Koo Lung, Ku Lung, Gam Tung, Chin Tong, Chin Tung, Lung Goon-Ting, Lung Kuan-Ting, Kan Tung, Kam Tung and Cliff Lok Kam Tung () (born 11 September 1948) is a retired Chinese film actor and martial artist who worked in the Cinema of Hong Kong.
 He began his career at the Peking Opera.
 He starred in at least 60 films between 1966 and 2001, most of them wuxia/martial arts pictures of the late 1960s and the 1970s.
 Films include "One-Armed Swordsman" (1967), "Golden Swallow" (1968), "Return of the One-Armed Swordsman" (1969), "The Wandering Swordsman" (1970), "King Eagle" (1971) and "The Black Enforcer" (1972).
Sir Run Run Shaw, GBM, CBE ( November 23, 1907 – 7 January 2014), also known as Shao Yifu and Siu Yat-fu, was a Hong Kong entertainment mogul and philanthropist.
 He was one of the most influential figures in the Asian entertainment industry.
 He founded the Shaw Brothers Studio, one of the largest film production companies in Hong Kong, and TVB, the dominant television company in Hong Kong.
Saga Studio (or Saga Film A/S) was a film production company in Denmark founded by John Olsen.
 Several years after Olsen co-founded ASA Film Studio with Lau Lauritzen Jr. and Henning Karmark, there was a falling out between the partners over financial issues.
 Olsen took his interests and opened Saga Studio as a separate company in 1942, which included a film studio, film rental business and the Saga Cinema, becoming the fourth largest film production company in Denmark and known for their comedy films.
 More than 80 films were produced by the studio from 1942 through 1974.
 Some of its most successful films were the popular comedies of Danish comedian Dirch Passer.
Zatoichi and the One-Armed Swordsman (新座頭市・破れ！唐人剣 , Shin Zatōichi: Yabure!
 Tōjin-ken ) , also known as Zatoichi Meets the One-Armed Swordsman, is a 1971 Hong Kong-Japanese "wuxia"/"chambara" crossover film directed by Chinese film director Hsu Tseng Hung and Japanese film director Kimiyoshi Yasuda.
 The film stars Jimmy Wang Yu as the "One-Armed Swordsman" Wang Gang and Shintaro Katsu as the blind masseur Zatoichi.
 This film is a crossover of the "One-Armed Swordsman" and "Zatoichi" film series.
Return of the One-Armed Swordsman, also known as One-Armed Swordsman Return, is a 1969 Hong Kong "wuxia" film directed by Chang Cheh and produced by the Shaw Brothers Studio.
 The film is a sequel to the 1967 film "One-Armed Swordsman", with Jimmy Wang and Lisa Chiao Chiao reprising their roles.
One Armed Swordsman Against Nine Killers is a 1976 Chinese film starring Jimmy Wang Yu.
 Although the film star Jimmy Wang Yu as the one-armed swordsman, it has no connection to the 1967 film "One-Armed Swordsman" and its sequel the 1969 film "Return of the One-Armed Swordsman".
Shaw Brothers (HK) Ltd. () was the largest film production company of Hong Kong.
One-Armed Swordsman is a 1967 Hong Kong "wuxia" film produced by the Shaw Brothers Studio.
 Directed by Chang Cheh, it was the first of the new style of "wuxia" films emphasizing male anti-heroes, violent swordplay and heavy bloodletting.
 It was the first Hong Kong film to make HK$1 million at the local box office, propelling its star Jimmy Wang to super stardom.
Wang Zhengquan (born March 28, 1943), known professionally as Jimmy Wang, is a Taiwanese actor, film director, producer and screenwriter.
 Wang rose to fame in 1967 with his starring role in "One-Armed Swordsman", a martial arts film produced by the Shaw Brothers Studio and "The Chinese Boxer" (1970).