Jiaonan farmers developed peanut harvester in 5 years. Starting in 2004, Du Shijin began to develop a peanut combine harvester. The first machine built 2 years later had to be announced due to its complicated application. fail. Du Shijin did not lose heart and continued to improve the machinery. In 2008, he finally perfected the machine to the stage where it could be used. But Du Shijin still did not stop, and continued to improve after many experiments. Du Shijin, a farmer who graduated from primary school in Boli Town, Jiaonan City, invested more than 200,000 yuan in five years. After three upgrades, he built his own machine for centralized purchasing, picking and harvesting. The integrated peanut combine harvester uses a variety of domestic leading agricultural machinery application technologies, attracting many domestic agricultural machinery manufacturers to come and learn from it. On October 22, 2009, Du Shijin said that he was applying for a patent for his self-made machinery.