Why do restaurants oil dishes first?

Hello, cooking in hotels is usually oily or oily. The reason is very simple, that is, to speed up the maturity of dishes. Because hotel guests love to make dishes, the chef will use the fastest method.

When cooking, some dishes must be oiled, such as fried shredded potatoes, fried shredded lotus roots, sweet and sour fillet fish and so on. Will fry first, using the method of frying outside and tender inside.