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 inch 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 inch thickness.
Flatten each filled dough with your palm, and pan-fried on a skillet at medium heat until golden brown on each side.