Generally, it is inserted using a puncture needle or an endoscope firstly, and then a catheter or dilation tube is introduced using a coaxial exchange guide method through this product. The tip of the product is soft and has no damage to the blood vessel wall. Using the nitinol inner core is easier to steer and more flexible; coating with tungsten-containing polyurethane makes the guidewire develop more accurately, clear and recognizable; hydrophilic coating is durable and smooth.