Layer one wrapper and brush some oil on top. Add another one and brush oil again. Repeat the process until all of the wrappers are well layered.
Press the edges and make sure they are well pressed. Use your rolling pin to press the wrappers 2 to 2 times on one side. And then turn over the press the wrapper again on the other side.
Roll out with a rolling pin until 12 to 15 cm in diameter. During the process, turn over from time to time.
Place the wrappers in a steamer. Steam for 20 minutes and tear off when they are still warm.
Serve directly or freeze in air-tight bag for latter use.