Before 2012, the purchase of subsidies to implement the price differential purchase, provincial settlement. Since 2012, we have conducted the pilot of all-price purchase and county-level settlement in jiangsu, zhejiang and hunan provinces. In 2014, all other provinces except Beijing, Tibet and heilongjiang province have implemented "all-price purchasing, quota subsidy, county-level settlement and direct compensation card" operation. In 2015, the total price of the whole price was adjusted as the self-purchasing machine, which highlighted the choice of farmers. In 2017, more than three-quarters of the provinces have implemented the "pre-purchase" operation mode, which will not require buyers to apply for indicators to further stabilize farmers' expectations. In some provinces, the application of mobile phone APP is used to handle subsidy procedures, so as to facilitate the application of subsidies.