Specific reasons are as follows:

1, area shrinkage, in recent years, Yuanzhi price downturn, farmers motivation frustrated, Yuanzhi planting area is shrinking year by year trend.

2, long growth cycle, low yield, far from the planting of three years to be dug after listing, long growth cycle, low yield, plus other expenses, far from the production cost has far exceeded the income.

3, the content of the old goods is not enough, far from the storage time is too long, some of the active ingredients will volatilize away, the content is reduced will also lead to the price of new goods.