What's the name of the stick that presses the dumpling skin? A rolling pin?

The stick that presses the skin of the dumpling is called a rolling pin. The skin pressed out with the rolling pin is called rolling dough.

Traditionally, dumplings were made by hand using a rolling pin to press out the skin, but nowadays, the traditional craftsmanship has been replaced by rolling machines. Because the merchants were greedy for small profits and tampered with the flour, a part of the housewives used the rolling pin to press the dumpling skins again.