Zhongyu Energy Holdings Limited (3633.HK) is an investment holding company engaged in the development, construction, operation, and management of natural gas projects and city gas pipeline infrastructure in China; it distributes piped natural gas to residential, industrial, and commercial customers, operates compressed natural gas (CNG) and liquefied natural gas (LNG) vehicle filling stations, and sells gas stoves, cooking appliances, and related equipment. Founded in 2001 and headquartered in Central, Hong Kong, the Cayman Islands-incorporated company, formerly known as Zhongyu Gas Holdings Limited, serves over 5.22 million residential and commercial users across regions with approximately 71,959 kilometers of gas pipelines laid and a coverage population of about 25.54 million. In recent developments, the company pursues an equity buyback program with a tranche update announced in 2024, advances smart energy initiatives with improved gross profit margins reported at 14.4% in its interim results for the six months ended June 2025, and experiences shifts in associate reporting by China Gas Holdings Limited as of November 2025.