A Randomized, Controlled, Double-Blind, Multicenter Phase III Clinical Trial to Evaluate the Efficacy and Safety of Enlonstobart, With or Without SYS6010 as Adjuvant Therapy, in Participants With Pathologically Residual Esophageal Squamous Cell Carcinoma Following Complete Surgical Resection (NCTNCT07924111) - Patient Guide & Enrollment Help