In a bowl, mix the dry ingredients: rice flour, wheat starch, and salt.
Then, get the 280g boiled water and gradually pour it into the dry mixture while stirring continuously with chopsticks or a stirrer. It should become lumpy and sticky.
When the dough is comfortable enough to touch, knead it until it is smooth. It should not be clumpy or sticky.
Once it becomes smooth, add 5g of oil and continue kneading until the oil is well incorporated into the dough.
Next, roll the dough into a long tube on a chopping board or flat surface.
Then, use a dough cutter to divide and cut the dough into several equal pieces about 2 inches wide.
Roll each piece into a long strand.
Afterward, cut each strand into smaller pieces about 1 to 2 cm long.
Take one piece and roll it into a silver pin using your palm. It should be thin and pointed on each end and thicker at the center.
Use a steamer or a simple pot with a lid with your pin noodles placed in a stainless steel container. Steam for 8 minutes once the water boils in the pot.
Then, drain the noodles and rinse them in water.