Introduction to Lanzhou's No. 1 Yellow River rafting: Lanzhou sheepskin rafting has been around since the Guangxu period of the Qing Dynasty, with a history of more than 300 years. Peel off the complete sheepskin, remove the hair with salt water, and smear the limbs and neck with vegetable oil. Then tie it into a bag shape with string, leave a small hole and blow enough air to seal the hole. Use wooden slats to tie several leather bags together. , a common sheepskin raft is made of more than ten sheepskin bags.