Longnan, Gansu, what firewood is planted in the mountains to make money?

Planting medicinal materials to make money in Longnan mountain area of Gansu Province. Due to the special geographical and natural environment in Gansu Province, farmers are currently living by planting medicinal materials. Mainly Bupleurum chinense. At present, the price of Bupleurum chinense is about 13 yuan/kg, and the income from planting one mu of Bupleurum chinense is about 3,500 yuan. But the investment in planting medicinal materials is also relatively high. The cost of pesticides and fertilizers is 300-500 yuan per mu, and the cost of digging medicinal materials is 300 yuan per mu, with many weeds in medicinal materials. Weed four or five times a year. Excluding these costs, the net income per mu is less than 3000 yuan a year.