Single Piece Study Chair adjusts scientifically in many dimensions, corrects children's sitting posture, Orthopedic Study Chair adjusts in many dimensions, and develops experts in correct sitting posture. Sitting down is the standard sitting posture. Rotate the handrail at 0-90, Moveable Study Chair saves more space, and it can meet various usage scenarios. Ergonomic Reading Chair is round and can be put away when not in use, saving space. Comfortable Ergonomic Chair wraps double backs, which can flexibly protect children's spine. The double backs have a dynamic four-way adjustment function. Kids Study Chairs follow the children's double back movement and double spine protection. Comfortable Study Chair saddle-shaped concave-convex cushion, which disperses hip pressure, has ergonomic structure, creates bionic saddle-shaped concave-convex cushion, and rationally creates zones, effectively dispersing hip pressure, making it easier to sit comfortably and stu…