This report focuses on the human rights situation in detention centers in China. Mr. Huang Sha distributed the questionnaire to the practicing lawyers he knew, and then the practicing lawyers took the questionnaire and filled it out in the form of questions and answers when they met detainees in the detention centers. The questionnaires were then collected and counted, resulting in a research report. The span of time for filling out the questionnaire in the detention center is: from July 2, 2019 to November 19, 2019. There were 101 valid questionnaires recovered.