Jaundice is one of the most common symptoms in the neonatal period. Clinical reports show that 20% to 30% of newborns may have visible jaundice. And early neonatal pathological jaundice is prone to bilirubin encephalopathy, so it is important to screen for early pathological jaundice. The percutaneous jaundice tester produced by our company applies optical fibre technology, photoelectric technology, electronic technology and data processing to percutaneous bilirubin measurement. The test is painless and harmless, as long as the probe is lightly pressed on the skin of the forehead of newborns and infants, the serum bilirubin concentration value can be directly measured in an instant. The instrument is small in size, light in weight, easy to operate and carry, which can be widely used in neonatal departments and paediatrics departments of grade hospitals for early screening of neonatal jaundice, and has a broad market application prospect.