Introduction: The sunny days of early summer are charming, and the occasional drizzle also makes the sky look clearer. At this time, we fantasize about a long-awaited rainbow appearing at the horizon, like a bridge hanging in the sky, pointing to a dreamlike fairyland. Red, orange, yellow, green, blue... emitting colorful lights. Although such a beautiful scene is rare, don't be regretful. Fashionistas will tie every color of the rainbow on their wrists to decorate their mood. In this issue, the editor has gathered watches of various colors. Whether it's a fiery red, a clear blue like water, or a dazzling golden yellow, every day we use watches with different colors to adorn ourselves and carry the enchanting rainbow colors all the way.