Iodine deficiency disorders (IDD) are a series of diseases caused by iodine deficiency in the natural environment that include endemic goiter, cretinism, subclinical cretinism, fetal abortion, premature delivery, stillbirth, congenital malformation, etc (1). Since 1993 when the State Council held the “Mobilization meeting of eliminating IDD in China by the year 2000”, the Ministry of Health planned to set up an annual publicity day for the prevention and control of IDD. Through the coordination between the Ministry of Health and other relevant departments, IDD Day was set on May 5 in 1994, and on May 15 since 2002. Since 1994, IDD Day has played an active role in mobilizing all levels leaders of governments and relevant departments as well as the public to support salt iodization in China. After nearly 30 years, the measures have been enriched to include slogans, posters, activities, national workshops, international conferences, and WeChat publicization, webpages, interviews, music videos, etc. IDD knowledge has been successfully spread among Chinese people and therefore ensured the health of masses (2). The national IDD survey shows that China has been in sustainable elimination status of IDD since 2005 (3). The 27th IDD day in China is arriving on May 15, 2020, and the slogans, posters, and music videos have all been prepared well.