Take a train from Linyi to Qingdao or Weihai by boat, instead of Yantai, you need a health certificate.
The general price of ship tickets is between 500 and 700.
It's best not to join a group. If the fraud is too serious, you can contact Korean students online first.
He can be a good tour guide for you, he won't cheat you, and he has a good language and is familiar with the local area.
(You can post an apocalypse on Fenhan. There should be many applicants. )
At least, three or four thousand is enough.