The Shaw Brothers continued to expand but suffered a setback during the Second World War when the Japanese occupied Malaya and Singapore. After the war, they began to rebuild. In the 1950s, Nanyang started to switch film production from Cantonese to Mandarin as Communist takeover in mainland China had cut off the supply of Mandarin films to overseas Chinese communities. In this period, Nanyang Studio operated under the company name of Shaw and Sons Ltd. The Mandarin films of the 1950s were primarily "wenyi" films (文藝片) in a contemporary setting as well as a few period dramas. In 1957, Run Run Shaw moved to Hong Kong, set up a new company, Shaw Brothers (Hong Kong) Ltd., and built a new studio at Clearwater Bay, which officially opened in 1961 as Movietown. In the mid-1960s, Movietown was the largest and best-equipped studio in Chinese filmmaking as well as the largest privately owned studio in the world, with 15 stages, two permanent sets, state-of-the-art film-making equipment and facilities, and 1,300 employees. Period and music dramas were popular in the 1960s, and later in the decade Kung fu films also became popular. Some of Shaw Brothers' most notable films were made in this period, including "The Magnificent Concubine", "The Love Eterne", as well as "One-Armed Swordsman", which broke the box office records and some spawned multiple sequels. The studio popularized the kung-fu genre of films, which included "Five Fingers of Death" and "The 36th Chamber of Shaolin" made in the 1970s. The 1960s was a period of intense rivalry between Shaw Brothers and Cathay Organisation, but eventually Shaw Brothers gained the upper hand and Cathay ceased film production in 1970. Sir Run Run Shaw became involved in television when TVB was launched in 1967. In 1969, Shaw Brothers (HK) issued shares and became a public listed company.