Set up in 2009, the predecessor to Shanghai Korain Biotech Co., Ltd, Shanghai Crystal Day Biotech worked with university lab, aimed at providing high-quality and affordable ELISA tools for lab researcher. After five-year of research and improvement, Shanghai Korain Biotech Co.,Ltd became a proprietary platform of ELISA kits and established its brand “bt-laboratory (known as BT LAB) ”, with a rich pipeline of 6, 000+ ELISA kits including Sandwich ELISA (enzyme-linked immunosorbent assay) kits, Competitive EIA (Enzyme Immunoassay) kits. In 2018 BT LAB launched its antibody line with 10,000+ antibodies. In October, 2019 our laboratory and warehouse were built in Jiaxing, Zhejiang Province. Now Korain's growing in 35 countries across 5 continents with over 2,000 citations.