There are three sacred mountains on the sea in China ancient mythology. Where are they?

According to Shan Hai Jing, there are three fairy mountains on the sea: Penglai, Yingzhou and abbot. These mountains are fairyland with elixir of life. However, the frequent mirage in Penglai waters aroused people's enthusiasm for seeking immortality and medicine, and ancient emperors such as Qin Huang and Hanwu began to seek immortality in Penglai.

In reality, only Penglai exists. It belongs to Yantai, Shandong.

The abbot did not. As for Yingzhou, it is Japan.