First take out the innermost paper and look outside.

Install the paper towel tube:

If it is a hanging toilet paper:

Open one end of the paper towel tube first, then disassemble the front part of the paper towel and put it underneath of the toothed bar and extend part of the outside, then put the paper towel into the paper towel tube and close the cover at one end of the paper towel tube. The paper towels should be placed side by side in the direction of the lower toothed bar. The lower toothed bar is used to tear the paper towels.

If it is a cylinder on the coffee table in the living room:

First, bend the paper core in the toilet paper roll with your thumb. Then, use the thumb of your right hand to push the paper core to the left, and use your left hand to pull out the paper core to the left. After pulling out the paper core, pull the paper in the center of the toilet paper roll upwards slightly. Open the paper towel roll cover and put in the toilet paper roll. Close the paper towel roll cover and the installation of the toilet paper roll is complete.