Assertion: vegetable oil's amount | /r/HasProperty | added down the side of the wok
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Source sentences:
text: First the wok is heated to a high temperature, and just as or before it smokes, a small amount of cooking oil is added down the side of the wok (a traditional expression is "hot wok, cold oil"), followed by dry seasonings such as ginger, garlic, scallions, or shallots.