Profile: Beijing Biocent International develops and supplies In-Vitro Diagnostic (IVD) test kits and vaccines. Our one step HCG urine pregnancy test is a highly sensitive test kit for the determination of HCG in urine specimens. This test kit is used to obtain a visual for early detection of pregnancy. Each test is enclosed in a moisture proof aluminum pouch with a silicon gel for long time storage. HBsAg test is a qualitative immunoassay that detects Hepatitis B Surface Antigen (HBsAg) in serum or plasma samples.