Who can recommend the most cost-effective plan for traveling from Nantong to Qingdao?

The first day of Laoshan (it is best to join a group and take a one-day tour of Laoshan 180/ person); On the second day, Qingdao seaside tour (on foot): Zhanqiao, Little Qingdao, naval museum, Luxun Park, Huiquan Bay, Badaguan, Eryu, Music Square, May 4th Square and Olympic Sailing Center (seaside first line); On the fourth day, Dengzhou North Road (by bus), Tsingtao Beer Street (visit Tsingtao Beer Museum, Tianmucheng Street with Qingdao characteristics, drink beer and eat seafood), and visit Taitung Third Pedestrian Street in the afternoon (by bus, it's nearby, just walk there if you know the way); This paper introduces a very popular and unique sightseeing bus in Qingdao-"Adventure Duck", which is the only amphibious bus in China. You can go sightseeing on the road and at sea, which is very distinctive. Qingdao "Adventure Duck" is currently operating in the Olympic Sailing Center. I've played it. It's exciting. The commentator explained it very well!