2. The strap joints are located at both ends of the strap, and the position of the joints determines the left, right, up and down positions of the strap. The way to distinguish the upper and lower parts is that the position of the watch joint is on the inner side of the strap, and the lower part is slightly shorter; The way to distinguish between right and left is to put the strap connector on the outside of the strap, and the lower segment is the same length as the upper segment.
3. If there is no joint on the strap, it is impossible to distinguish up, down, left and right according to the position of the joint. At this time, you can distinguish up and down or left and right by observing the characteristics of the strap, such as brand logo or design details, or refer to the manual.