中国人自己设计的现代化大桥，为何通车89天即被炸毁？

Core Viewpoint - The article reflects on the historical significance and engineering challenges of the Qiantang River Bridge, emphasizing its role in Chinese history and the sacrifices made during its construction amid wartime conditions [1][3][36]. Group 1: Historical Context - The Qiantang River Bridge was the first modern bridge in China designed and constructed entirely by Chinese engineers, symbolizing national pride and technological advancement [3][4]. - The bridge was completed in 1937 but was destroyed shortly after its completion to prevent it from being used by invading Japanese forces, highlighting the tragic circumstances of wartime [1][37]. Group 2: Engineering Challenges - The construction faced numerous difficulties, including the unique geological conditions of the Qiantang River, characterized by deep layers of quicksand and strong tidal forces [11][13][26]. - Innovative techniques, such as the "water jet method" for pile driving, were developed to address the challenges posed by the river's conditions, significantly improving construction efficiency [27][28]. Group 3: Financial and Political Aspects - The funding for the bridge was a significant challenge, requiring collaboration between various banks and government entities to secure the necessary capital [16][17][18]. - Political tensions and the involvement of multiple stakeholders, including the Ministry of Railways, complicated the financing and construction process [18][19]. Group 4: Personal Sacrifices and Leadership - The lead engineer, Ma Yisheng, demonstrated exceptional commitment and leadership throughout the project, often working under extreme pressure and facing personal risks [30][32]. - The emotional toll of having to destroy the bridge he had worked so hard to build was profound for Ma, reflecting the deep connection engineers have with their creations [37][38].