Selenium-rich foods. Shandong Shengliangzhuang Brand Management Co., Ltd. was established in June 2020. It is a national chain brand with more than 20 direct stores and more than 100 franchise stores. It mainly operates selenium-rich foods and strives to build the first brand in the selenium-rich industry. The company's management is people-oriented, company philosophy, integrity, fraternity, cooperation, and win-win.