Is Jiangsu Port Group the main hall?

Yes

Jiangsu Port Group is a department-level enterprise, while Nanjing Port Group used to be a department-level enterprise. The general manager is a department-level cadre, so is the joint-stock company, and the general manager is concurrently appointed. The business scope of Jiangsu Port Group Co., Ltd. includes port and shipping supporting services, storage, development and utilization of land resources along the Yangtze River, port industry investment, management of assets related to rivers, seas and ports, investment, management and operation of equity and funds.