346 Siyang section can only be started after the design scheme is approved and the capital investment problem is solved.

1, for approval. Before construction, engineering design approval must be carried out, including design scheme approval, project bidding and other links.

2. Financial issues. The Siyang section of 346 involves a lot of capital investment, and the government's financial resources and budget are limited, so it is impossible to start construction in an all-round way.