The steps to publish Weibo with triangle music on your mobile phone are as follows:

1. Open the Weibo application and click the plus icon in the upper right corner of the interface.

2. Select the "Write Weibo" option.

3. On the Weibo editing page, click the "#" icon (pound key) at the bottom.

4. In the pop-up search box, search for the music you want to share.

5. In the search results, select songs with a music icon or a music symbol (note) in front of it.

6. After editing the Weibo text, click "Send". After completing the above steps, the posted Weibo will contain a music link with a triangle number.