Surabaya county. Surabaya county Yinhe Starch Co., Ltd. Address: Beizhuang Village, Huacun Town, surabaya county, Jining City, Shandong Province. Since the establishment of 1978, after more than 40 years of struggle, the company has now built the largest sweet potato food processing enterprise in China, with total fixed assets of 654.38+0 billion yuan, covering an area of 1500 mu, with an annual comprehensive processing capacity of more than 400,000 tons, driving the sweet potato planting area of 600,000 mu and resettling the population of 1600 people.