Introduction to the Abacus Museum: The "Abacus Museum" is located in the main courtyard of the former Qujia Manager's Courtyard in Shanxi Shang Old Street. It systematically displays to visitors nearly a thousand various arithmetic tools and the current collection. Some abacus data reveal the profoundness of abacus as the essence of Shanxi merchant culture. The museum displays ancient primitive abacus models and abacus from various periods. It is currently the largest museum in the country dedicated to collecting, researching, and promoting abacus culture.