作业做完了的孩纸你真坚强
[zuò yè zuò wán le de hái zhĭ nĭ zhēn jiān qiáng]
This name is likely chosen as a self-praise from a student. The phrase 'The child who has finished his homework is really strong' means the person feels proud and relieved after finishing something boring and demanding. It may have also some irony, meaning that they were overwhelmed by such an ordinary task like homework.