Question: What is the name of this ongoing construction project, which consists of a series of bridges and tunnels and located some 32 km south of the planned Shenzhen-Zhongshan Bridge?
Sentence (from "Shenzhen–Zhongshan Bridge"): The proposed 51 km eight-lane link is scheduled to be completed in 2021 and is expected to cost around US$4.83 billion.
Relevant evidence: No