Student Hu Banghao's actual combat project, typhoid fever is difficult to distinguish from other diseases that cause fever, and a clear diagnosis is required, but the conditions are harsh, cumbersome, time-consuming and labor-intensive. TUBEX * TF is a rapid in vitro diagnostic test method. The test principle is based on the semi-quantitative colorimetric assay of the immunoassay. Colorimetric determination requires moving samples and color card comparison, so easy access is an important function of reagent workbench.