It crosses Jiaozhou Bay between Fenghuangdao and Tuandao stations by a cross-sea tunnel parallels with the road tunnel.

The northern section was opened on 24 December 2020 with 15 stations from Qingdao North Railway Station to Dongguozhuang.

Note that section between Xingguo Road and Dongguozhuang is planned to split from line 1 to be the Phase 1 section of line 7 in the future.

The southern section from Wangjiagang to Qingdao North Railway Station opened on December 30, 2021.

[1] This Chinese rapid transit article is a stub.