Founded in March 2003, Ningxia Ansun Bioengineering Co., Ltd. is a high-tech enterprise specialized in fermentation. Its staple products include amino acids such as L-Arginine, L-Glutamine, L-Leucine, L-Isoleucine, L-Valine, L-Citruline, L-Ornithine, and L-Theanine, as well as a 5-carbon sugar D-Ribose. The company also produces amino acid feed additives L-Threonine and L-Lysine. The company headquarter and manufacturing site are located in Wuzhong, Ningxia Province. Ningxia is known as “Oasis by the Yellow River North of the Great Wall”, is the cradle of Western Xia civilization. Its R&D department and international business department are located in Beijing.