Set up a steamer with enough water and bring to a boiling.
Spread noodles on a steamer and then steam for 4-5 minutes. Then add a small pinch of salt in the water and then transfer the noodles in the water. Heat until the water boils again.
Transfer out and add 1/2 tablespoon f oil immediately (This will help to avoid the noodles being sticky with each other). Stir to mix well. Use chopsticks to stir the noodles up repeatedly to help the noodles cool down quickly. In hot days, you can even resort to an electric fan.
Cook the noodles according to the instruction on the package. I recommend you only cook the noodles about until 80% cooked.
When the noodles are completely cooled down, add shredded cucumber and all the other seasonings. Mix well and serve cold.
Drizzle some chili oil on top, garnish green onion and roasted peanuts.