Golden Century International Holdings Group Limited, an investment holding company, engages in the exploration and exploitation of the coalbed methane (CBM) gas in Hong Kong and the People's Republic of China. It operates through Electronic Components, Coalbed Methane, Financial Business, Wealth Management, Proprietary Investment, and Comprehensive Healthcare segments. The company explores for, develops, and produces CBM with a total exploration area of 425.628 square kilometers in Anhui Province, China, as well as provides technology services for CBM development and utilization.

It also engages in securities brokerage, money lending, and consultancy and referral service businesses. It also sells electronic components; and offers secretarial, financing, and corporate services, as well as engages in insurance brokerage and asset management activities. The company was formerly known as International Standard Resources Holdings Limited and changed its name to Golden Century International Holdings Group Limited in March 2020.

Golden Century International Holdings Group Limited is headquartered in Causeway Bay, Hong Kong.