text, logo, wordmark, writing, heading, signature,lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurrylowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry,tidy classroom,Neat tables and chairs，{No extra people, no extra hands, no extra feet}."{avoid unnecessary movements}.{Three legs}, {four legs}, {two dynamics}, {twisted hands and feet},{Three hands},{four hands},{two people}.{Incorrect insertion of human body structure},{ incorrect connection of human body structure}, {incorrect occlusion of objects}.