On June 22, 2026, the State Administration for Market Regulation, the Ministry of Industry and Information Technology, the National Health Commission, and the National Administration of Disease Control and Prevention established a joint investigation team to address the issue of formamide in infant diapers reported by public opinion. They adhered to the principle of seeking truth from facts, carefully verified clues, went to multiple places to conduct on-site investigation and verification, research and demonstration, and carried out comprehensive and in-depth investigation work. At present, the investigation work has been completed, and the investigation status is now reported as follows:
1. Regarding the detection of formamide in diapers as reflected in public opinion
(1) Carry out supervision and random inspections on infant diaper products. After the public opinion broke out, the State Administration of Disease Control and Prevention organized local disease control departments to conduct comprehensive random inspections of all 168 domestic infant diaper manufacturers (including OEM companies). A total of 368 batches of finished diaper samples of 180 brands were sampled, and authoritative testing institutions such as the Chinese Center for Disease Control and Prevention and the Chinese Academy of Quality Inspection and Testing were entrusted to conduct testing. At the same time, 32 batches of site-specific inspections were carried out on key parts such as waist circumference and hook-and-loop fasteners of some key brands of infant diapers. According to the test results, no formamide was detected in 368 batches of finished product samples and 32 batches of partial samples.
(2) Re-inspect the remaining diaper samples tested by relevant self-media bloggers. The investigation team sealed the remaining diaper samples tested by Wang Moumou, a blogger with the Xiaohongshu platform’s self-media account “Reliable Laowang”, and organized the Chinese Center for Disease Control and Prevention, the Chinese Academy of Quality Inspection and Testing, and the Beijing Center for Disease Control and Prevention to re-inspect the fully packaged samples. Formamide was not detected in any of the 58 batches of samples from 15 brands that were re-inspected. The Ministry of Industry and Information Technology organized experts from the Shenzhen Institute of Advanced Technology of the Chinese Academy of Sciences, the Chinese Academy of Quality Inspection and Testing and other units and representatives of important relevant parties to have face-to-face technical exchanges with Wang Moumou and conduct a complete reproduction of his detection process. It was found that there were many problems such as the detection method not being rigorously confirmed and the deviation of the detected mass-to-charge ratio data from the accurate mass of formamide not being assessed. It was impossible to draw the conclusion that formamide was detected.
(3) Conduct on-site inspections of infant diaper manufacturers. After the public opinion broke out, the National Bureau of Disease Control and Prevention immediately deployed local disease control departments to conduct on-site supervision and inspection of all 168 infant diaper manufacturers (including OEM companies). Judging from the inspection results, the inspected enterprises complied with the hygienic standards for disinfection product manufacturers, and no formamide was found to be added or contained in the production process and raw materials.
2. Regarding the detection of formamide in blood as reflected in public opinion
(1) Investigate and verify the Mass Spectrometry Research and Clinical Application Center of Shandong Provincial Public Health Clinical Center. Before the public opinion broke out, there were no relevant reports at home or abroad on the detection method of formamide in blood. After investigation and verification, the blood formamide detection carried out by the Mass Spectrometry Research and Clinical Application Center of the Shandong Provincial Public Health Clinical Center (hereinafter referred to as the Shandong Mass Spectrometry Center) began in June 2026 and is in the preliminary research stage. The person in charge of the center, Yu Moumou, and his assistant Li Moumou both admitted that their detection methods are not yet perfect.
(2) Research and judge the results of formamide detection in blood conducted by Shandong Mass Spectrometry Center. Experts from the Clinical Testing Center of the National Health Commission, the Shandong Provincial Center for Disease Control and Prevention and other units verified the blood formamide detection carried out by the Shandong Mass Spectrometry Center and found that the related tests had the same signal detected in the blank matrix, the signal-to-noise ratio of the sample detection did not meet the basic requirements for qualitative analysis, artificial selection of test data points, deletion of original data and other issues. The experts unanimously believed that the blood formamide detection process carried out by it was unreliable and the detection conclusions were not trustworthy.
(3) Re-examination of blood samples from Shandong Mass Spectrometry Center. The investigation team sealed 210 blood samples used for testing by the Shandong Mass Spectrometry Center and brought them back to Beijing for re-examination. Academicians and experts from the Clinical Laboratory Center of the National Health Commission, the Chinese Center for Disease Control and Prevention, the First Affiliated Hospital of China Medical University, Beijing Association Hospital and other units have repeatedly demonstrated and verified, and formed a blood sample formamide detection method. At the same time, this method was used to conduct parallel re-examination of blood samples sealed and brought back from the Shandong Mass Spectrometry Center. Formamide was not detected in any of the 210 blood samples.
3. Investigation and verification of other relevant information regarding the detection of formamide in infant diapers
(1) Investigate and verify the testing status of Hefei Guangchi Product Testing Research Institute Co., Ltd. After investigation and verification, public opinion showed that the third-party professional testing agency that detected formamide in infant diapers submitted for inspection was Hefei Guangce Product Testing Research Institute Co., Ltd. (hereinafter referred to as Hefei Guangce). Since Hefei Guangce did not have the ability to detect formamide, it entrusted the testing task to Suzhou Puze Testing Technology Co., Ltd. (hereinafter referred to as Suzhou Puze). The Ministry of Industry and Information Technology organized experts to analyze and judge the test data provided by Suzhou Puze. They believed that there were many problems such as blank samples and parallel samples were not tested, the peak time of the standard material was not compared, and the sample spectrum matched only 7% with the formamide standard spectrum. The test process and judgment basis were not rigorous, and it was impossible to draw the conclusion that formamide was detected.
(2) Investigate and verify the testing situation of Lianxin Testing (Jiangsu) Co., Ltd. On June 25, two screenshots of infant diaper test reports from Lianxin Testing (Jiangsu) Co., Ltd. (hereinafter referred to as Lianxin Testing) were leaked online. The marked formamide detection values were 414mg/kg and 384mg/kg respectively, attracting public attention. After investigation and verification, the online report was an electronic draft sent by Lianxin Testing to the client to verify the sample and customer information; during the review, the company's professional auditors found that the retention time of the characteristic peak of the substance corresponding to the data result was different from that of formamide, and it was determined that formamide was not detected. The company immediately communicated with the client, withdrew the electronic draft of the report, and publicly stated that the two reports posted online were invalid.
(3) Investigate and verify the detection of formamide by Shen, the blogger of "Shenbo Health Evaluation". After June 20, the self-media account "Shenbo Health Evaluation" released multiple diaper evaluation videos on Xiaohongshu, WeChat video account, Douyin and other platforms, saying that formamide was detected in many types of infant diapers. After investigation and verification, it was found that the blogger of the self-media account was Shen, who did not have the corresponding testing capabilities and actually entrusted Zhao to conduct the testing. After the investigation team organized experts to analyze and judge the testing situation of Shen and Zhao, it was believed that their relevant testing had problems such as the testing method was not confirmed, blank samples and parallel samples were not tested, the qualitative principles were unclear, and the original data was deleted. It was impossible to draw the conclusion that formamide was detected.
Formamide testing of infant diapers is a serious and professional inspection and testing activity, and the health hazards related to formamide require more careful and objective research. The Shandong Provincial Health Commission has dealt with the violations found by medical institutions and personnel in accordance with relevant regulations. Relevant departments will continue to strengthen the supervision of infant products, guide production companies to improve quality management systems, and strictly implement health and safety responsibilities. All sectors of society are welcome to actively participate in jointly creating a safe and secure consumption environment.
