Haijiao Coastal Hotel Bathroom Case

Quick answer：

The 'Haijiao Coastal Hotel Bathroom Case' refers to a specific incident or situation related to a bathroom within the Haijiao Coastal Hotel. More details are needed to provide a relevant response. If this case is well-known in the context of hotel management, architecture, or legal issues, further information about the nature of the case would be helpful. Otherwise, no information is available.