RecruitingPhase 3Drug trialDonanemab (LY3002813) Trial in Chinese Participants With Cognitively Unimpaired (Preclinical) Alzheimer's DiseaseThe main purpose of this study is to evaluate the effects of donanemab (LY3002813) versus placebo in Chinese participants who are at risk for decline of memory, language and physical ability to perform activities of daily living from Alzheimer's disease (AD). The study drug will be administered intravenously (IV) (into a vein in the arm). The study will last up to approximately 156 weeks, excluding screening.