There is a very high risk of sliding on undetected thin ice, which may lead to serious consequences such as ice breaking, drowning or hypothermia. In order to ensure safety, **It is strongly recommended to avoid sliding on ice that has not been professionally tested**. If you must set foot in a thin ice area, please follow the following safety principles： --- ### **1. Pre-assessment and preparation** -**Ice thickness detection**: The thickness of the safe ice layer must reach at least **10 cm** (single activity) or **20 cm** (small group). Multi-point measurements need to be made with professional tools (such as ice drills) to avoid relying on the judgment of the naked eye. -**Observe the characteristics of the ice surface**： -**Safety signs**: Clear blue ice is usually stronger; white or turbid ice may contain bubbles or snow, and its strength is lower. -**Danger signals**: Cracks, sound of water flow, partial melting, near the edge of open water. -**Environmental factors**: Fluctuations in temperature, water flow, wind or recent rainfall can significantly weaken the ice. --- ### **2. Necessary protective measures** -**Wear life-saving equipment**： -**Buoyancy device**: Such as life jacket or buoyancy jacket. -**Crampons and ice picks**: Easy to rescue yourself or climb out of trouble. -**Waterproof and warm clothing**: Reduce the risk of temperature loss. -**Act together**: At least two people walk together, keep their distance (spread the weight), and make sure someone can call for help or assistance. -**Bring emergency tools**: ropes, whistles, mobile phones (packaged in waterproof bags), and ice rescue poles. --- ### **3. Emergency response** -**If the ice breaks**： 1. Stay calm and quickly spread your arms to spread your weight. 2. Crawl slowly back to the same path (reduce local pressure). 3. Use an ice pick or a sharp object to hook the solid ice surface to get out of trouble. -**Rescue others**： -**Do not approach directly**, use ropes or long poles to drag. -Make an emergency call and specify the location. --- ### **4. Alternative** -**Choose a professional ice rink**: A manually maintained skating rink is definitely safer. -**Consult local agencies**: Obtain an ice condition report from the park management department or the weather station. --- **Important reminder**: The ice conditions in nature are complex and changeable, and even experienced people may misjudge. Risky behavior not only endangers oneself, but may also involve rescuers. Safety is always the first priority!