Core Viewpoint - The successful completion of the shield tunneling for the Guangzhou East to Huadu Tiangui Intercity Railway marks a significant milestone in the construction of the line, which is crucial for the integration of the Guangdong-Hong Kong-Macau Greater Bay Area's transportation network [1] Group 1: Project Details - The shield tunnel has a maximum excavation diameter of 13.56 meters, making it the largest diameter shield tunnel for the Guanghua Intercity line [1] - To address complex working conditions, a single-tube double-track construction scheme was adopted, utilizing the "Yangcheng" large-diameter shield machine [1] - The "Yangcheng" shield machine is equipped with an intelligent system aimed at achieving the engineering goal of "one-time excavation, halving the risk" [1] Group 2: Strategic Importance - The Guanghua Intercity Railway is a vital component of the intercity railway network in the Guangdong-Hong Kong-Macau Greater Bay Area [1] - Upon completion, the line will facilitate connectivity with Guangzhou Metro Line 18 and the Nanzhu (Central) Intercity Railway, contributing to the establishment of a "one-hour living circle" in the Greater Bay Area [1] - The project further promotes the development of the "Railway-based Greater Bay Area" initiative [1]