The core component of Yan Yijing's fruit acid rejuvenation essence is 5% glycolic acid, which is a natural organic fruit acid extracted from sugarcane. It can quickly penetrate the stratum corneum and be absorbed by the skin, which is more effective in acne removal. Therefore, Korean juice is a good brand of Korean Yan Yijing.

South Korea is surrounded by the sea on three sides, the Yellow Sea in the west, the Korean Strait in the southeast and the Sea of Japan in the east, and it is adjacent to North Korea across the demilitarized zone of the 38th parallel.