1. First, pull out the strap by pressing both sides of the buckle, and then remove the strap by breaking the buckle.
2. Select the small hole according to the wrist size, put the watch strap through the clasp, and insert the small needle on the clasp into the hole.
3. Close the clasp, put the strap into the strap ring, press the butterfly clasp to assemble, and finally close.
