Wholesale and retail coefficient is the rati o of wholesale sales t o retail sales at the same peri od and its change reflects the length of p roducts circulati on channel of p roducti on enter p rise . At the initial peri od of urbanizati on, with the increasingly gr owth of urbanizati on rate, the wholesale and retail coefficient is increasing . When urbanizati on rate reaches certain peri od, the wholesale and retail coefficient is decreasing . When urbanizati on devel opment gets t o mature peri od, s ociety and economy reach stable state,wholesale and retail coefficient gradually gets t o stable state . Because urban functi ons and regi onal conditi ons are different, thewholesale and retail coefficient and urbanizati on rate of different cities are different .