Self-check a selenium-enriched element, and the national authoritative testing department stipulates that the selenium element testing fee is one 200 yuan, and the testing report is issued for one week. Let the merchant bear the cost of testing.

Many businesses are willing to bear this cost in order to maintain the sun list and praise, because many people can't think of doing this kind of publicity for businesses. Therefore, businesses generally agree that as long as you are a loyal old customer of their channels.

Testing can be carried out in food testing centers in various cities. The service is good. After mailing the samples, we will pay you an invoice issued by 200 yuan. After the test report comes out, it will be sent back to your home. The government is still very responsible for testing and has a task, so the service is in place.

How to use selenium-enriched wok;

First, use a selenium-enriched wok to polish the tiny burrs or unsmooth places. Put the pot on the stove, put a spoonful of cooking oil in the pot, and use ginger while heating it with slow fire. Ginger is the right size to hold and iron. Dip in the oil and wipe the pan all over the place until all the wiped places are thoroughly oiled. Don't wash the iron pot with cold water right away.