Biochemical combination II, generally this is the combination of tests that clinics and hospitals do themselves. However, routine biochemical tests, regardless of the combination, include liver function, kidney function, bilirubin, electrolytes, protein and other tests. The examination of liver function includes testing serum transaminases to understand the liver function, and the indicators of kidney function are mainly creatinine and urea nitrogen. Bilirubin is mainly in total bilirubin as well as indirect bilirubin to understand whether jaundice is present and to check whether liver function is impaired. Electrolytes, on the other hand, are tested by detecting electrolytes such as potassium, sodium, chloride and calcium in the body to observe whether there is any disorder.