QINGDAO, China, Jan. 06, 2026 (GLOBE NEWSWIRE) -- Since the opening of the northern section of Line 3 in December 2015, Qingdao bid farewell to its "zero metro" era and entered a new phase of urban development. Over the past decade, the rail transit network has rapidly expanded from an initial 12 kilometers to 352 kilometers today. With an average daily ridership of approximately 1.5 million passengers, the system has cumulatively served nearly 2.6 billion passengers. Qingdao Metro has now transitioned from ...