Provides strong security for bicycles, significantly reducing the risk of theft by keeping the bike firmly secured when locked. Portable foldable design: built from multiple sturdy folding components that can be flexibly folded into compact shapes. Lightweight and easy to carry in a backpack or to hang on a bicycle, making it ideal for commuters and travelers who frequently stop at different locations during trips. Versatile and affordable: adapts to varied and complex terrains, easily wraps around bicycles and fixed objects, and remains costeffective. Suitable for safer environments such as university campuses, public parking areas with surveillance, and places with foot traffic. Protective outer layer: the outer surface of the lock body is wrapped in soft, wearresistant environmentally friendly materials. This helps prevent scratches to the bike's paint and frame when locking, preserving appearance and extending the bicycle's service life. Use scenarios: City commuter with multiple stops: carry in a backpack and quickly lock to racks or poles at coffee shops, offices, or libraries. Campus or campusadjacent parking: secure to bike racks or fixed objects in areas with CCTV and pedestrian flow. Travel and multilocation trips: fold compactly for packing or bag storage and use at hotels, transit hubs, or rental bike stations during travel.