17：31。 Blue Ocean Hotel Dongying Dongcheng is a foreign-related hotel affiliated to Shandong Blue Ocean Hotel Group, which integrates food, business travel and meetings. It is located in the residence of Dongcheng District Municipal Government in Dongying City. Its buffet business hours are: Monday to Sunday from 16: 31 to 13: 3117: 31 to 21: 31, so it starts at 17: 31, so it is a very good hotel.