How to delete all conversations in QQ space?

So far, there is no way to delete all the words at once. I can only delete them one by one. I have deleted it for a long time. I'm depressed about how I wrote so many feelings in the first place. There is a suggestion that I can delete them so that I can be less sad. It is suggested that the landlord play a music and delete it while listening. Maybe it won't be too much trouble to delete them! Hope to adopt, thank you!