This prospective, randomized, blinded, multicenter clinical study aims to evaluate the safety and efficacy of autologous adipose-derived regenerative cells (ADRCs) in improving hand dysfunction in patients with systemic sclerosis (SSc). The study plans to enroll 48 eligible patients, randomly assigned to two groups. The experimental group will receive ADRCs, prepared from the Celution system, which is injected into specific sites on each finger of both hands. The control group will receive standard care according to established treatment guidelines. The primary endpoint is the change from baseline in the Cochin Hand Function Scale (CHFS) score at 24 weeks. Secondary endpoints include assessments of skin thickness, Raynaud phenomenon, hand strength, quality of life, pain, and other measures at various time points. Safety and device performance will be monitored throughout the study. This investigation seeks to explore a new potential therapeutic direction for managing hand dysfunction in systemic sclerosis.