you can take bus no.912 and subway line 2.

1. From Qingdao to Huangdao Mangrove Hotel, you can take Bus No.912 and get off at Huangdao Bus Station, which takes about 11 minutes to walk.

2. You can also take Metro Line 2 and get on the bus at May 4th Square Station, and get off at Binhai Xincun Station and walk for about 11 minutes.