条件筛选
-
It Is Too Early for QR Codes to Guarantee Agricultural Product Quality and Safety
Recently, a news story caught my attention. After one year of using a QR code traceability system for the grain and oil products used by 800 schools in Huizhou, Guangdong, schools and parents alike have been giving it a "thumbs up," believing that this move has greatly "improved" the quality and safety level of grain and oil in school cafeterias.