Is Guo Tong Pipeline Co., Ltd. a central enterprise or a state-owned enterprise?

First of all, there is something wrong with your question itself. State-owned enterprises and central enterprises are not juxtaposed concepts. Central enterprises are state-owned enterprises owned by the central government and are a kind of state-owned enterprises. Central enterprises are all state-owned enterprises, but state-owned enterprises are not necessarily central enterprises.

The controlling shareholder of Guo Tong Pipeline Co., Ltd. is Xinjiang Tianshan Building Materials Group (relative holding), and the controlling shareholder of Tianshan Building Materials Group is Sinoma Group (absolute holding). Sinoma Group is a state-owned enterprise directly managed by the State-owned Assets Supervision and Administration Commission of the State Council, which means Sinoma Group has the ultimate controlling stake in Guo Tong Pipeline Co., Ltd. If it goes on like this, the national unified pipeline should be regarded as a central enterprise. It is a central enterprise. Of course, it is also a state-owned enterprise.