Where can I buy sweet potato seedlings near Rizhao?

Xingfeng Sweet Potato Cooperative in Donggang District, Rizhao City. Baidu map shows that Xingfeng Sweet Potato Professional Cooperative, located in Donggang District, Rizhao City, Shandong Province, is mainly engaged in planting sweet potatoes and potatoes, providing sales services, production materials supply, information consultation and technical services for members to grow sweet potatoes and potatoes. Rizhao City is located in the southeast of Shandong Province, bordering the Yellow Sea in the east, Linyi City in the west, Qingdao City and Weifang City in the north, Lianyungang City in Jiangsu Province in the south, and facing South Korea and Japan across the sea.