The qq music limited time challenge mode is in the QQ music client. The method to find the qq music limited time challenge mode is:

1. First, you need to download and install the QQ music client, and then open it app.

2. On the homepage, you can see an option called "Limited Time Challenge Mode". Click this option and you will enter the game interface of the song guessing challenge.

3. Here, you can start the challenge and guess the name of the song. It can be seen that the qq music limited time challenge mode is in the QQ music client.