The model “Outdoor Disinfection Warning System” in the field of Environmentally Friendly Products created by student Nguyen Nhu Quynh, Class 9A of Luong The Vinh Secondary School - Tuy Hoa City (the school year of 2021-2022) won the first prize of the 7th National Youth and Children Innovation Challenge in 2021-2022. The Contest has contributed to promoting the movement of technical innovation in