Do double eyelids first, or do it at the same time. It doesn't matter. Double eyelids are permanent, and line carving lasts for 2 ~ 3 years at most. You can also consider not doing line carving for a short time, which will damage subcutaneous tissue. Although the effect is quick, the scar left under the skin is too short to maintain. It is said to be 2 ~ 3 years, but in fact it will be back to its original shape in two years at most. I have worked in a plastic surgery hospital and done line carving.