2. Secondly, press the red arrow hard to bend it slightly, as shown in the figure below, and then proceed to the next step.

3. After completing the above steps, the temples are easy to loosen, and the screws between the temples and the frame need to be adjusted, as shown in the figure below, and then proceed to the next step.

4. Then, after completing the above steps, turn the screwdriver clockwise to tighten it, but don't screw it too tightly to damage the frame, as shown in the figure below, and then proceed to the next step.

5. Then, after completing the above steps, move the temple by hand to check whether its tightness is appropriate, and then make fine adjustments, as shown in the figure below, and then enter the next step.

6. Finally, after completing the above steps, you can move the steel wire of the bridge of the nose and bend it inward to adjust the tightness, as shown in the figure below. In this way, the problem is solved.