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SIYUAN has undertaken the general design works for such regional and inter-city rail transit projects as Yangtze River Delta, Pearl River Delta, Wuhan City Circle, Changsha-Zhuzhou-Xiangtan City Cluster, etc., and has been engaged in the preparation of Technical Code on Chinese Intercity Rail Transit. The completion and operation of a large number of inter-city railways such as Shanghai-Nanjing Railway, Shanghai-Hangzhou Railway, Nanchang-Jiujiang Railway, Guangzhou-Zhuhai Railway, etc., are of great significance in terms of further promoting the formation of inter-city integrated transportation system as well as facilitating people’s traveling.