青岛港：公司集装箱板块的控股公司以轻资产模式经营，而合营公司以重资产模式经营

Group 1 - The core viewpoint of the article is that Qingdao Port (601298) operates its container segment through a light asset model for its holding company, while its joint ventures utilize a heavy asset model, leading to different gross profit margins [1] Group 2 - The company clarified the operational differences between its holding company and joint ventures, emphasizing the impact of business models on profitability [1]