Sanqi is graded according to the number of heads. A catty, 50 notoginseng becomes 50, and 20 notoginseng becomes 20. The difference between the two is that 20 heads of notoginseng are bigger, more solid and full; Secondly, 20 Panax notoginseng have a long growth period. Generally, it takes at least 3 years to plant Panax notoginseng, 5 years to plant 20 Panax notoginseng, and 7 years to plant more precious 12 and 10. These two differences determine that the efficacy of 20 panax notoginseng is better than that of 50 panax notoginseng, and the price is more expensive.