Is Shanghai Metro a state-owned enterprise or a private enterprise?

According to (Tianyancha) query, Shanghai Metro is affiliated to Shanghai Shentong Metro Group Co., Ltd. and is a state-owned enterprise. It has the qualification of A-level taxpayer with a registered capital of 300 million yuan. As a state-owned enterprise, the operation and management of Shanghai Metro is supervised and guided by the state, and it is its important duty to provide safe and convenient urban transportation services for the public. State-owned enterprises have a national background and public interest orientation, and their business objectives are mainly to meet the travel needs of the public and provide high-quality services.