A standard razor will not give you detailed brows, and can be dangerous to use near your eyes. Instead purchase an eyebrow razor, whose small blade will give you the brows you desire. You can order an eyebrow razor online or purchase one at your local beauty supply store. You will get a closer shave if you apply shaving cream to the area of skin surrounding the eyebrow. Try starting with a dime-sized amount, and use more if necessary. Try applying the shaving cream when you get out of the shower. Only put shaving cream over the part of your eyebrow you want to shave. Use a cotton swab to wipe away any excess shaving cream so you can see what you're doing. Use your non-dominant hand to hold the skin around the eyebrow taut. This will help you get a closer, more detailed shave. Then use your dominant hand to begin shaping your eyebrow. It’s important that you stroke the razor in the same direction that your eyebrows grow. If you use the blade in the opposite direction, you can nick your skin and possibly create ingrown hairs. Instead, gently stroke the razor in the direction that your eyebrows grow. Also, avoid shaving above your eyebrows or they could look unnatural. You should check your progress in a mirror as much as possible. It is easy to accidentally shave off too much of your eyebrows. To prevent this from happening, step back and look in the mirror after completing each section of eyebrow. In order to maintain the look of your newly shaped eyebrows, you will want to shave them regularly. Try shaving about once a week, or more if your hair grows quickly.

TL;DR in Chinese:
买把修眉刀。 涂一点剃须膏。 拉紧眉毛旁的皮肤。 从下面顺着眉毛生长的方向修眉。 经常检查进展状况。 每周修一次，保持眉形。