Crack the eggs into a bowl, add sugar and salt, and beat well until the egg whites are fully broken up.To break up the egg whites thoroughly, place the tips of your chopsticks against the bottom of the bowl and move them quickly back and forth without lifting them. For an even smoother, more refined finish, strain the egg mixture through a fine-mesh sieve. Heat oil in a pan over medium-low heat. Once the oil is hot, use a paper towel to spread it evenly across the entire surface of the pan, including the edges. Then, remove the pan from the heat and let it sit for about 30 seconds.
Pour the egg mixture into the pan and swirl it so that the egg spreads into a thin, even layer. Use just enough to cover the pan from center to edges. The egg mixture will begin to set from the residual heat, so use only enough that it barely moves when you tilt the pan.
Return the pan to the stove and cook over medium-low heat. Once about 80% of the surface looks set, turn off the heat, cover the pan, and let it steam for 1-2 minutes.
Carefully remove the egg sheet from the pan, taking care not to tear it, and let it cool. Repeat the process, starting from Step 2 (beginning with oiling the pan), until all of the egg mixture is used up.
Once all of the egg sheets have been cooked and cooled, fold each one in half, then gently roll it into a loose cylinder. Slice into thin strips about 1/16 inch (1-2 mm) wide.