"Northeast does not have door of guard against theft industry of relevant form a complete set, basically component wants Cong Yongkang to match, and we will be whole door has done carry to arrive northeast ability 30 yuan of freight, price advantage is very clear. Additional, northerner deal has a habit, after he fixes a price, how many money would rather not sell petty gain, we are different, if project amount is large, look have a few yuan a door is good earn sold, sale mechanism is relatively agile. " introduced from the northern and western nationalities or from abroad Ding Fu says.