Prepare the spring onion filling: Finely chop 300g spring onion and place it into a bowl. Add 1/4 tsp five spice powder, 1/2 tsp salt, and 2½ tbsp neutral oil, then mix well until the seasoning coats the spring onion evenly. Let the mixture sit for a few minutes until the spring onion softens and reduces in volume.
Layering the dumpling wrappers: Place 1 dumpling wrapper on a work surface and spread 1/2 tsp spring onion mixture on top. Add 1 dumpling wrapper and another 1/2 tsp spring onion mixture. Repeat until you have 4 dumpling wrappers layered with filling between each layer.
Flatten the layered stack: Press the layered stack gently with your hand, then roll it with a rolling pin into a slightly larger oval shape.
Cut the pancake into strips: Use a knife to cut 4 lines along the longest side of the pancake, making sure the strips remain attached at the top and bottom edges. This will form 5 long strips connected together.
Roll the strips into a long shape: Roll the pancake along the direction of the strips to form 1 long layered strip.
Coil the strip like a spiral bun: Roll the long strip from left to right into 1 spiral coil, then gently press it flat. Roll lightly with a rolling pin if needed.
Pan fry the pancake: Heat 2 tbsp neutral oil in a frying pan over low heat. Cook pancakes slowly for several minutes on each side until both sides are golden brown and crispy.