Is Beijing-Guangzhou Port Investment Holding Group a state-owned enterprise?

No, Beijing-Guangdong-Hong Kong Investment Holding Group is a private joint-stock company, belonging to a private enterprise, not a state-owned enterprise. State-owned enterprises refer to state-owned enterprises. State-owned enterprises refer to wholly state-owned enterprises, wholly state-owned companies and state-owned capital holding companies that the State Council and local people's governments perform the responsibilities of investors on behalf of the state respectively.