How can I change the keep-warm time of Mi Smart Kettle Pro?

Mi Smart Kettle Pro has a default holding time of 12h for each temperature range, and you can modify the holding time for each range individually. Open the kettle in Mi Home App, for example, if you want to change the keep-warm time from 12 hours to 1.5h for 70, tap the temperature you want to change the keep-warm time, and then slide the length bar to the desired length.
Note: The range of the keep warm time is 1-12h and the increase is 0.5h. The modification will be synchronized to the kettle.