Chow Tai Fook brand inherited the lanyard, if you want to adjust the length. You can twitch the slipknot on the necklace rope, and pull it outward to shorten the length of the necklace rope. If you pull it to the middle position, you can lengthen the length of the lanyard. Chow Tai Fook inherited the hanging rope, and each model has a slipknot configuration, and the length of the rope can be adjusted by pulling the slipknot at will.