To achieve the perfect scallion pancakes, here are a few tips to keep in mind. First, make sure to use fresh scallions for the best flavor. Chop them finely and evenly so that they are distributed throughout the dough. When rolling out the dough, dust your work surface and rolling pin with flour to prevent sticking. Roll the dough into a thin, even circle for a crispy texture. When frying the pancakes, use a non-stick pan and add enough oil to cover the bottom of the pan. Cook the pancakes over medium heat until they are golden brown on both sides. Finally, drain the pancakes on a paper towel to remove any excess oil before serving. With these tips in mind, you'll be able to make delicious scallion pancakes that are crispy on the outside and soft on the inside.