2016年春季學期開始之後，白雲路分校部分學生出現頭暈、反胃、流鼻血、眼睛紅腫等病徵。5月底學校開家長會，有家長發覺學校重新整好嘅操場有陣隨好攻鼻，於是懷疑學生嘅病同個操場有關。根據家長發起嘅調查，參與調查嘅278個學生，有239人出現上述病徵，做咗血常規同凝血功能檢查嘅88個學生當中有56人查到血小板、凝血酶原、白血球、淋巴細胞數異常。6月頭，學校操場停用，學生停課。北京市西城區教委跟手介入調查，卒之公佈嘅檢測結果係個操場符合國家標準，淨係得一間班房甲醛爆錶。西城區教委話，雖然操場符合標準，佢哋都係會拆咗個操場佢。6月17至19號，白雲路小學拆咗操場，20號恢復上堂。不過，一間家長委託嘅公司喺6月22號公佈檢測結果，塑膠跑道有兩個指標爆錶，抽樣嘅16間班房全部都有甲醛爆錶嘅問題。
After the start of the spring semester of 2016, some students of Baiyun Road Branch experienced symptoms such as dizziness, nausea, nosebleeds, and red and swollen eyes. At the end of May, the school held a parent-teacher conference, and some parents found that the school's reorganized playground was sometimes a good one, so they suspected that the students' illness was related to a playground. According to the survey initiated by parents, 239 of the 278 students who participated in the survey had the above symptoms, and 56 of the 88 students who had done routine blood tests and coagulation tests were found to have abnormal platelets, prothrombin, white blood cells and lymphocyte counts. In early June, the school playground was closed and students were suspended. The Education Commission of Xicheng District, Beijing then intervened in the investigation, and finally announced that the test results were that the playground met the national standards, and only one classroom had formaldehyde off the table. The Xicheng District Education Committee said that although the playground met the standards, they would still tear down a playground for him. From June 17th to 19th, Baiyun Road Elementary School demolished the playground and resumed classes on the 20th. However, a company entrusted by parents announced the test results on June 22, and two indicators of the plastic runway were out of the table, and all the 16 class rooms sampled had the problem of formaldehyde.