Hello, we are from Zhuhai delicious snacks training company, specializing in the training of stewed dishes and cold dishes. Let me answer your question. Winter is different from summer. Use red oil in summer, and put more oil to look good. It is best not to put oil in winter. When it's cold, the oil solidifies and it's ugly to float on the surface of vegetables in vain. You can choose other oils to replace lard, crude oil and salad oil, and use sesame oil instead.