Social promotion refers to the phenomenon that others are present to promote the completion of their activities and improve the efficiency of their activities when an individual is engaged in an activity. According to the above definitions, Which of the following are not social promotion:. ["When students are doing mathematical calculations, the teacher's spectator can make the students fully use their brains.", 'Xiao Wang lifted up the fallen uncle Li, and he felt that he had done something meaningful.', 'When employees are in production, the plant manager stands in the workshop, and the staff efficiency will be greatly improved.', 'When a football player walks into the stadium, he sees that there are no seats on the field.']