安通控股：子公司海南安盛船务有限公司注册地为海南省海口市，且实质性运营

Core Viewpoint - The company, Antong Holdings (600179.SH), holds a significant market share in the Hainan container logistics market, with a 55% share and over 60% at Haikou Port, maintaining the highest throughput in the region for several consecutive years [1] Company Operations - Antong Holdings primarily engages in domestic container comprehensive logistics services, while its international operations are conducted mainly through chartering vessels [1] - The company's domestic container throughput at Haikou Port ranks among the top three [1] - The subsidiary, Hainan Ansheng Shipping Co., Ltd., is registered in Haikou, Hainan Province, and is operational [1]