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Core Viewpoint - The opening of the metro lines 4, 6 (eastern section), and 8 in Jinan marks a significant milestone in the city's transportation development, transitioning into a connected metro network era [1][2] Group 1: Metro Network Development - The simultaneous opening of three metro lines is expected to inject new vitality into Jinan's transportation network, making the metro a more important travel option for residents and alleviating traffic congestion [1] - Jinan's geographical constraints have historically made it difficult to establish an efficient circular road network, leading to severe traffic congestion [1][2] Group 2: Urban Development and Governance - The construction of the metro lines serves as a test of Jinan's urban governance capabilities, successfully balancing the preservation of natural resources (such as the underground springs) with infrastructure development [2] - The new metro lines are anticipated to enhance the city's spatial development strategy, increasing Jinan's appeal to young people and boosting its urban influence [2]