Eight U.S. states announced on Wednesday that they have launched a bipartisan survey nationwide on tiktok, a subsidiary of the United States, focusing on whether tiktok is harmful to young people's physical or mental health. The survey will also find out how much tiktok knows about his role in sustaining these injuries. "One of the key points of the survey is the methods and technologies used by tiktok to improve the participation of young users, including increasing the length of time spent on the platform and the frequency of using the platform." The office of Maura Healey, Massachusetts attorney general, said in a statement. Tiktok said in a statement that the company "focuses on the safety of young users" and limits functions according to age. "We look forward to providing information about many of the security and privacy protections we provide for teenagers." Tiktok said. (Xinhua News Agency)