To check the renewal time of Jiuyang net kettle, you can unpack Jiuyang net kettle and take it out. On the lid of net kettle's pot, you can find a label. Open the tab and it will show the update time of net kettle. This time refers to the time when the net kettle needs to be replaced, which is usually determined according to the service life or filter life. This renewal time is different from the warranty period of Jiuyang net kettle. During the warranty period, if there are quality problems in net kettle, you can contact Jiuyang after-sales service center for repair or replacement.