There is no potato variety with the name "Chaoliu". There is a potato variety called "Yunliu", also called "Black King Kong Potato", which is produced in Gansu. It is a virus-free potato with high seed quality, high yield and strong disease resistance. The other potato is "V6", which is produced in Inner Mongolia, with good potato type, no bud eyes, white skin and white heart. According to Cha Huinong. com, the potato varieties are Snowden, Eugene and others. In addition to the above varieties, purple and red old potato varieties were crossed with excellent high-yield potato varieties, and more than 100 copies of colored potatoes with different strains were improved and screened.