The Impact of School Belonging to Subjective Social Status of Middle School Students: Mediating Effect Base on Mental HealthTsai Feng Kao, Yi Zhan Du, Lian Yang, Yu Cheng Shen and Yin Gzi WangSHS Web of Conf., 171 (2023) 01031DOI: https://doi.org/10.1051/shsconf/202317101031