Healthy weight of thin beauty in the north = "height (cm)- 150" × 0.6+43 = 53.8 (kg).

Healthy weight of southern thin beauty = "height (cm)- 150" × 0.6+38 = 48.8 (kg).

You are now 166, which is 52.6 according to the standard of thin beauty in the north.

According to the standard of southern thin beauty, it is 47.6.

So it's completely up to standard, and there's no need to lose again. Your figure is very standard now ~