How do I create a new discussion or delete one I don't need on mobile?

Create a new discussion: 1. On the Discussions page, tap "+ 新增" to the right of the search field. 2. Fill in the discussion topic as instructed on screen.

Delete a discussion: 1. Find the discussion you want to delete in the list. 2. Tap the trash icon at the right of that row.

This deletes the entire discussion topic, so make sure you no longer need it before you proceed.