1. Predictionof domestic prices for soybean: Historical domestic prices of soybean fromDecember 2006 to December 2016 were analyzed based on the theory of price spiral model (PSM) (Fang, 2011)  and the historic ratio of world soybean consumption to the global soybean production(consumption ratio). According to the data for the last six months, the soybean international consumption ratio is at equilibrium. Domestic soybean prices are also at equilibrium but fluctuating around the trend line. Thus domestic pricesfor soybean will fluctuate more.

2. Prediction of domestic prices for paddy rice: Based on the theory of price spiral model (PSM) (Fang, 2011) andChina paddy rice consumption ratio to analyze trend of domestic price of paddyrice from December 2006 to December 2016. The effect of change tracking hasbeen proved: Early warning decided in September 2016:’It has come to the top of consumption tension. Above all, with the change of relationship between supplyand demand, recent downward price trend of paddy rice in China will slow down.At present, the price has returned above trend line, if it can keep for fivemonths, we can assume price is on an upward trend.

3. Prediction of domestic prices formaize: Domestic prices of maize from December 2006 to December 2016 were analyzed based on the theory of price spiral model (PSM) (Fang, 2011) and China maize consumption ratio. The prices have hit bottom, the consumption rate has enteredthe non-equilibrium interval, which shows the supply and demand situation is conducive to recovery. Again we give an early warning of the flip of declining price trend.

4. Prediction of domestic prices for wheat: Domestic prices of wheat from December 2006 to December 2016 were analyzed based on the theory of price spiral model (PSM) (Fang, 2011) and China wheat consumption ratio. Current wheat prices and consumption rates in the equilibrium range, the characteristic of this period is price has changed from early ’decline will gradually calm down’ to above trend line at present, if it can keep for five months, we can assume price is on an upward trend.