11月10日更新：优化了一下次难某几处不对劲的地方；变速段的速度从0.75x 变为0.85x。sv仅为曲子节奏契合而不是故意卡手而修改.应该会打的更舒服吧（
Nov. 10 Update: Optimized a few things in [Hard the rock] ; the sv in all of difficulty is changed from 0.75x to 0.85x. It changed because sv worked with the rhythm of song, not for disgust. Maybe you'll feel more comfortable.XD