How did Shanghai agree to Su Tong Yongjia high-speed railway?

The reason why Shanghai agreed to connect Suzhou Jiayong high-speed railway.

1. The state cancelled the projects of Tongsujia Railway and Shanghai-Nanjing Railway, and merged them into Tongsujia-Ningbo Railway, which is positioned as a national railway trunk line with eight vertical lines and eight horizontal lines. Top-down promotion, led by the railway corporation, directly contact Suzhou, Jiaxing and Ningbo to cooperate with related work.

2. Jiangsu and Zhejiang provinces are through, which is the main railway of coastal passage.