What are we, and where do we come from? - Searching for flavour in beauty Nowadays the Large Hadron Collider (LHC) at CERN is the best known high energy physics research facility. However, there are other facilities around the world performing cutting edge high energy physics research. Some of these are the so called flavour factories which have a long tradition in high energy physics. Two of these are currently in operation: BES III in China and Belle II in Japan. Collecting huge amounts of data, the goal of these experiments is to measure free parameters of the standard model of particle physics with very high precision to find deviations from predictions by theory. Such deviations can hint to new physics, and physicists are still searching for the reasons of our very existence as by our best knowledge nothing but light should have remained after the big bang. But testing the standard model is challenging.