+----------+
| user     |
|----------|
|id        | <---+
|user      |     |
|passwd    |     |
|nickname  |     |
|status    |     |
+----------+     |
                1:n
+-----------+    |      +-----------+
| feedback  |    |      | news      |
|-----------|    |      |-----------|
|id         |    |  +-->|id         |
|title      |    |  |   |title      |
|content    |    |  |   |content    |
|datetime   |    | 1:n  |datetime   |
|status     |    |  |   |status     |
|user_id    |o---+  |   |user_id    |
|news_id    |o------+   +-----------+
+-----------+