Beijing, July 7 (Youth.cn) -On July 6th, 2023, in Guangzhou, the "Craftsmanship" shield tunnel machine with a diameter of 13.65 meters arrived at the receiving steel casing, marking the completion of the first large-diameter shield tunnel in the central urban area of Guangzhou and the successful completion of the Pazhou branch line of the Pearl River Delta Intercity Railway on schedule.