Swimming across a fast-moving river is extremely dangerous and is not recommended. However, if you are faced with such a situation and have no other choice, here are some tips to help you improve your safety: 1. **Assess the situation**: First, carefully observe the width of the river, the speed of the water, and whether there are any obstacles in the water. Look for the narrowest and calmest area of flow. 2. **Prepare for entry**: Remove excess clothing and shoes and make sure your movements are not restricted. If possible, use a long stick to test the depth of the water and potential underwater obstacles. 3. **Swim diagonally**: Instead of swimming directly to the other side, swim downstream at an angle. This method reduces the resistance of the water and helps you reach the other side faster. 4. **Maintain buoyancy**: Keep your body as horizontal and parallel to the water as possible, and control your direction by moving your arms and kicking your legs. Try to relax your body to maintain buoyancy and conserve energy. 5. **Use terrain**: If possible, use natural terrain such as rocks and high places in the water to help you cross the river. Be careful of rapids and whirlpools, which can pull people underwater. 6. **Stay calm and act within your means**: Avoid panic and properly estimate your own physical strength. If you find it difficult to continue swimming, try to return to the starting point or find a shore to rest. The above suggestions are only for emergency reference and are by no means a guarantee of safety. It is strongly recommended to cross the river under the guidance of professionals or with safety equipment. Properly assess the risks and the first priority is to protect your own safety.