Kangbao potato is a specialty of kangbao county, Zhangjiakou City, Hebei Province. Kangbao county has a long history and rich experience in potato planting, with an annual planting area of about 300,000 mu. Kangbao county belongs to Bashang Plateau in Zhangjiakou, with an average elevation of1.450m.. Potato adapts to the natural conditions in kangbao county, which is the main food and vegetable crops in this county. It has a long planting history and rich planting experience. In recent years, due to the continuous improvement of production conditions, the promotion of excellent varieties and the development of market economy, the potato planting area in kangbao county has been expanded year by year, with an average annual planting area of about 300,000 mu, accounting for 23% of the grain area and 15% of the total cultivated land area, with a total output of about 450,000 tons. The main potato varieties planted in kangbao county are as follows: a. Virus-free and flower-free (middle-mature varieties introduced from Holland, with starch content of 14.5%, protein content of10.55% and VC content of 210.2 mg100).