Where can I get a seaman's health certificate in Yantai? How can I get there?

Do you mean Yantai Entry-Exit Inspection and Quarantine Bureau? There is an entry-exit inspection and quarantine bureau not far east of the intersection of Haigang Road and Ma Bei Road. I wonder if it is what you are looking for. If yes, Yantai Bonded Port Area also has an export processing zone office, and the development zone also has an office, west of the intersection of Changjiang Road and Zhuhai Road. As for the seafarers' health certificate, the diving hospital next to the seamen's vocational college in Zhifu District should be able to do it. I'm not sure about this.