Mix flour and salt in a heat proof bowl. Add the hot water and stir until almost all of the water has been incorporated.
Knead dough into a smooth ball. The dough should be pliable and slightly tacky. Note 1
Cover the bowl and let the dough rest for a minimum of 30 minutes. Note 2
Add five spice, flour, and oil to a bowl and mix. Set the paste aside.
Divide the dough into 8 pieces.
On a oiled surface, roll out one piece of dough into a thin circle, about 10" in diameter. Brush about one tablespoon of the oil mixture on top of the dough, leaving some room at the edges. Sprinkle a generous handful of green onions over the surface.
Starting on one end, roll the dough into a log. Then roll into a spiral. Repeat with the other 7 pieces of dough.
Flatten one spiraled dough with your hand. Then, use a rolling pin to roll it out into a circle about 6 to 7 inches in diameter. Repeat with the remaining dough pieces.
Pan fry the pancakes on medium heat for 2 to 3 minutes per side, until golden brown and crispy.
Combine all dipping sauce ingredients together. Serve pancakes with sauce.
To Freeze: Stack uncooked pancakes on a flat tray with parchment or wax paper in between to prevent sticking. Place the whole tray in the freezer for a few hours to harden before transferring the pancakes to a freezer bag. Frozen scallion pancakes are pan-fried the same way as fresh scallion pancakes, but they will take a few minutes longer to cook.