Group 1 - The concept of "zero transfer" in integrated transportation centers reflects the modernization and internationalization of cities, with many airports across the country adopting this model [1] - Several airports, including Changsha Huanghua, Zhengzhou Xinzheng, Chengdu Tianfu, Nanning Wuxu, Nanchang Changbei, and Lanzhou Zhongchuan, are either under construction or have completed integrated transportation centers, while Shandong stands out with two such centers [1] - Qingdao Jiaodong Airport is developing an integrated transportation center, enhancing the connectivity between Qingdao and Jinan airports, which is crucial for the development of the Jinan metropolitan area and the coordination of the Jinan-Qingdao metropolitan area [1] Group 2 - The Shandong Provincial Committee emphasized the importance of supporting the collaborative development of international air cargo hubs at Jinan and Qingdao airports [2] - The expansion of Jinan Airport is a key project for establishing it as a modern integrated transportation hub, combining air, rail, and land transport [2] - Jinan is set to become a strategic point in the northern region, connecting air corridors and rail networks, following the examples of Beijing-Tianjin-Hebei, the Yangtze River Delta, and the Central Plains [2]