Look, that is, check whether there is water overflow on the outside of the tank and near the toilet;

Listen, that is, there is water injection time in the water tank, if there is more than the regular water injection time, there is still water inflow when the toilet inlet is heard;

To find, first open the toilet tank lid to see if the water injection height has exceeded the horizontal line indicated by the toilet tank buoy; after finding the cause, repair it.

Repair: After finding the cause of the leak in the toilet, find the tool and replace the corresponding fittings and fittings.