Go to Kiehl's and ask for Blemish control daily skin treatment sample.
I've been using it and really the acne scar gone in few weeks only.

If you want natural way, use rice water. Just put some water over a pile of rice and apply the water onto your face like toner.
Much cheaper, very effective, but have to change the water every few hours, very hassle.

have you found the way to reduce the 凹凸问题of your skin? I am interested to know the way too.. some sellers asked me to use derma roller.. have u heard of it before? but it's not so convenient to be used..