Mix flour with water to form dough. Cover the dough with a damp towel; let the dough rest for more than an hour. Cut green onion to half an inch size. Divide the dough into 4 portions.Work with one-dough at a time.
Flatten the dough with a rolling pin to about 9 in. in diameter. (Remember to sprinkle flour to prevent the dough from sticking onto the table). Continue to stretch the dough with your fist until the dough is paper-thin. (Very much like stretching pizza dough, this step requires some skill). Brush the thin sheet with oil, sprinkle salt and green onion.
Roll the dough sheet into a log shape, and cut the log into an in. thickness.
Flatten each filled dough with your palm, and pan-fried on a skillet at medium heat until golden brown on each side.