余姐教做老面引子，花不两块钱免费用一年，余姐教你使用老面和面的方法，和加碱面的比例及烙锅坎馍的全部过程
Sister Yu taught to do the old face introduction, spend less than two dollars free of charge for a year, sister Yu taught you to use the old face and face method, and add alkali face proportion and the whole process of cooking pot