How to standardize the annotation of user rating time in Review Schema?

When specifying user rating times in the Review Schema, the `datePublished` property must be used and follow the ISO 8601 time format standard. Specific specifications include: - **Core Property**: Use the `datePublished` field to mark the rating publication time. This property is a required field for the Review type defined by Schema.org and directly relates to the timestamp of the user's rating behavior. - **Format Requirement**: The time must be in ISO 8601 format, with the basic format being "YYYY-MM-DD" (e.g., 2024-03-15). For greater precision, time and time zone can be added (e.g., 2024-03-15T14:30:00+08:00). In practice, annotation can be achieved through structured data code (such as JSON-LD) to ensure the time is consistent with the actual rating submission time. After completion, it is recommended to use Google's Structured Data Testing Tool to verify the format correctness to avoid failure to display rating information in search results due to non-standard time annotation.