Grandview Film Company Limited was one of several companies that operated in Kowloon City. The location marker on this page is approximate. The company set up shop in Hong Kong in 1935. One source lists its productions/operation between 1935-1958.
Great Wall Movie Enterprises, Ltd.* was one of several companies that operated in Kowloon City. According to Wikipedia, it was founded in 1948. Its first film was released in January 1950*.
Wikipedia source: "In 1982, Great Wall merged with Feng Huang, Chung Yuen and Sun Luen Film Company as Sil-Metrople Organization." As such, operation under the name Great Wall was considered to have ended in 1982. <Read more ...>
Wader Studio was located on Castle Peak Road of the current Kwai Fong, Hong Kong. The location marker is approximate*. The source listed below show that the company produced films during the period 1950-1970.
*Edit - October 3, 2017 - as per philk's advice, I have moved the marker a bit north to the general vicinity of Block B and Block C of the current industrial centre by the road. Thanks.