If you mainly go to Yantai, you can sign up for a tour group in Qingdao. Tour groups can be found everywhere, especially on the trestle. Take Qingdao as an example, it is Badaguan, Twelve Baths, Zhanqiao, May 4th Square, Shilaoren, Laoshan and other scenic spots.
Go to Penglai on the third day. When you arrive in Penglai, you can go to Penglai Pavilion, Qi Jiguang's hometown. One day is enough.
You can go back to Yantai on the fourth day. I don't know if you are familiar with Yantai, so I'll talk about her scenic spots. The essence of the whole city is her coastal road. I suggest you take her 17 bus, along Binhai Road, with great scenery along the way. You can come down to play when you pass by Changyu Museum. Then you can go to Yantai Mountain and the consulate group at the foot of Yantai Mountain, and then go to the first bathing beach, as well as Moon Bay, Trestle, Jade Belt Mountain, the second bathing beach and the Pearl of the Yellow Sea. There are nanshan park, Yuhuangding and Tashan in the city.
If you stay for two days, you can go to Weihai on the sixth day.
Weihai has Liu Gongdao, Huaxia City and so on. Just one day, go to Dalian by boat at night.
On the last day of playing in Dalian, of course, it is best to sign up for a tour group. When you get off the boat, you can go to the railway station by car or by bus. There are many tours near the railway station, and there is also a tourist service center. You can choose where to play.