Question: The Hong Kong company listed on what, cooperates with the operator of Guangzhou-Shenzhen Railway?

Context paragraphs:
Lai Sun Development: Lai Sun Development ("LSD") is a public company listed on the Hong Kong Stock Exchange established in 1987 by the textiles magnate Lim Por-yen.  His company, Lai Sun Garment, ("LSG") was founded in 1947, is also listed on the Hong Kong Stock Exchange.  Lai Sun Garment is the controlling shareholder in LSD.

Beijing–Kowloon Through Train: The Beijing-Kowloon Through Train () is an intercity railway service between Hung Hom Station (formerly Kowloon Station until 1998) in Hong Kong and the Beijing West Railway Station, jointly operated by the MTR of Hong Kong and China Railway, China's national rail service.  The train runs to Beijing and Hong Kong every other day.  Services use the East Rail Line in Hong Kong, cross the boundary between Hong Kong and mainland China at Lo Wu and then continue along China's railway network via the Guangshen railway and the Jingguang railway to Beijing.  Total journey time is approximately 23 hours, and the train uses 25T class train carriages.

Guangzhou–Shenzhen Railway: Guangshen Railway or Guangzhou-Shenzhen Railway (), also known as the Chinese Section of the Kowloon-Canton Railway () in 1911-1949, is a railway in Guangdong province in the People's Republic of China, between Guangzhou and Shenzhen.  It is operated by Guangshen Railway Co., Ltd., a publicly traded company.

MTR Corporation: MTR Corporation Limited () is a Hong Kong company listed on the Hong Kong Exchange, and a component of Hang Seng Index.  MTR runs Hong Kong's Mass Transit Railway (MTR), and is also a major property developer and landlord in Hong Kong.  It also invests in railways in different parts in the world, and has obtained contracts to operate rapid transit systems in London, Stockholm, Beijing, Shenzhen, Hangzhou, Melbourne, and Sydney.

China Mobile Hong Kong Company Limited: China Mobile Hong Kong Company Limited ("CMHK") is the wholly owned subsidiary of China Mobile Limited (HKEx: 941, NYSE: CHL).  The Company was incepted in January 1997 and was the first PCS operator to launch the services in Hong Kong.

Green Tomato Limited: Green Tomato Ltd ("GreenTomato") is a mobile application service provider established in 2003 and headquartered in Hong Kong.  It was listed as both a Red Herring "Global 100" and "Asia 100 company" in 2007 and it was the first Hong Kong company to have achieved both titles.

Hengli Railway Station: Hengli () is a railway station in Hengli Town, Dongguan, Guangdong Province, China.  It is on the Guangzhou-Shenzhen Railway and is managed by the Guangshen Railway Company.  Built in 1911, Hengli is currently a class 4 station on the national railway station scale.

Nangang Railway Station: Nangang is a railway station in Nangang Town in the Huangpu District of Guangzhou City, Guangdong Province, China, on the Guangzhou-Shenzhen Railway.  Managed by the Guangshen Railway Company, the station was built in 1910 and is a class 4 station on the national railway station scale.

Guangshen Railway (company): Guangshen Railway Co., Ltd. (GSRC) is the operator of Guangzhou-Shenzhen Railway (Guang-shen Railway), the 152-kilometre railway link between Guangzhou and Shenzhen in Guangdong, China.  The company is engaged in railway passenger and freight transportation between Shenzhen and Pingshi and certain long-distance passenger transportation services.  It also cooperates with MTR Corporation in Hong Kong in operating the Guangdong Through Train passenger service.  The market capitalization of Guangshen Railway Co., Ltd. is around HK$5 billion in January 2016.

Great Eagle Holdings: Great Eagle Holdings Limited () is a Hong Kong real estate company listed on the Hong Kong Stock Exchange.  Through its subsidiaries, it engages in property investment and owns and operates various hotels.  Its head office is located at the Great Eagle Centre, Harbour Road, Wanchai, Hong Kong.

Supporting paragraphs: Guangshen Railway (company) MTR Corporation
Answer: Hong Kong Exchange