The standard method for querying longevity flower edible oil is as follows:

1. National standards query website: You can log in to the Chinese standardization website to query relevant national standards, such as GB1535-2017 "Edible Vegetable Oils" "wait.

2. Industry association websites: You can check the official websites of relevant food industry associations, such as the China Oils and Fats Association, China Food Additives and Ingredients Association, etc., to view relevant standards and specifications.