1. Good cleaning effect!!! Lin Di Tengchong Hot Spring Handmade Sulfur Soap is made by hand using Tengchong sulfur. Tengchong's sulfur is well-known for its antibacterial properties, making it an excellent soap for removing acne on the back. 2. Gentle and non irritating!!! Lin Die Tengchong Hot Spring Handmade Soap uses plant-based soap base, which is gentle and non irritating to the skin. It is particularly friendly to friends with fragile skin, as it can wash away acne without worrying about irritating the already fragile skin.