History of the Han Dynasty

                The Han dynasty was the most important dynasty because it included the inventions of the wheelbarrow, and the seismograph.  The wheelbarrow is used so much now for yard work and in businesses.  It helps you carry a load in an easy and efficient way.
 The seismograph is used to measure the magnitude of an earthquake.  The little pen that hangs from a string picks up the vibrations of the tectonic plates moving under the surface of the earth.  The more the plates move the bigger the spikes will be that the seismograph produces..  These are both very important inventions that help us in life today and in the future.  The inventions in the Han Dynasty make this dynasty the most important in Chinas' history.