Sorry, I don’t know which is the largest seafood buffet in Qinhuangdao, but I can recommend some seafood buffet restaurants in Qinhuangdao to you. There are many seafood buffet restaurants in Qinhuangdao, some of the more popular ones include:

* Haitian Yise Seafood Buffet: This restaurant mainly deals in seafood, and also provides Cantonese, Sichuan, Huaiyang, Hunan, and local cuisines. Dishes and other specialties.

* Baiwei Yizu Buffet: This restaurant offers a variety of cuisine, including seafood, barbecue, snacks and desserts.

* Beidaihe Haitian Yise Buffet: This restaurant offers a variety of cuisine, including seafood, barbecue, snacks and desserts.

* Beidaihe Seafood Eight Bowls: This restaurant focuses on seafood and provides a variety of seafood dishes.

* Fisherman’s Seafood at No. 16, Zhujiang Road, Qinhuangdao: This restaurant offers a variety of seafood delicacies, including fresh seafood, grilled fish, seafood stew, etc.

The above restaurants are all popular seafood buffet restaurants in Qinhuangdao. You can choose the appropriate restaurant according to your needs and tastes. Of course, there are many other excellent seafood restaurants in Qinhuangdao, you can choose according to your interests and time.