Tools: watches, thumbtacks, paper clips, jewelry hammers, sharp taper pliers.

1, put the watch side on the plane. Make sure that the bracelet to be removed is at a certain distance from the desktop. Calculate the links you need to delete. Find the small hole in the joint. That's where the watch chain was taken.

2. Find the push pin, fix the bracelet, and use the push pin to push out the pin connected to the bracelet. Push the connecting pin of the watch chain with the push pin. If you can't get out, knock with a jewelry hammer and knock out the needle. A small part of the push pin or paper clip should be inserted into the joint. Continue to use the jewel hammer to pull out the link pin a little.

3. Remove the connecting pin. Now you can pull out the connecting pin by force. Once enough connecting pins are exposed on the other side of the bracelet, you can clip it out with needle-nosed pliers. Needle-nosed pliers gently grip the tail of the needle. Pull it out, which will delete one extra bracelet. Repeat the same step on the other bracelet of the watch.

4. Remove the watch from the removed bracelet, and then reinstall it on another bracelet of the watch. Use the same method as the bracelet to obtain the clasp. There should also be a needle to fix the button. Take it off with a jewelry hammer, push pin or paper clip and needle-nosed pliers. Reconnect the retaining ring.

5. Re-button the watch. Align the clasp with the last bracelet of the watch. Take a needle and insert it into the hole. All you need is a gentle push and the needle can go up. Knock the needle in gently with a gem hammer. Repeat the above steps when installing the retaining ring on the other side. Now your strap should be adjusted and assembled.

6. If you adjust the strap too small, you can add a bracelet on each side of the strap. If you still think the strap is too big, reassess that you need to delete every bracelet to make it just right.