What is a unilaterally adjustable front fork?

Hehe, although the hardness of this fork is adjustable, it feels nothing, almost nothing. Unless 1000 yuan or more, the air fork and oil fork will feel it. . I used to use a D-3 fork (￥700), which can adjust the hardness and lock it. It's not bad to lock it up, but it doesn't feel soft or hard. Those are all theoretical, so so hehe. So there is no need to do it. It's the same again The soft and hard adjustment of the front fork of a bicycle with a price of three to five thousand yuan is almost not ideal, unless it is locked, that is, the feeling of locking and unlocking. Don't say anything soft or hard.