Food processing, environmental protection and so on. According to the inquiry of official website in Jinghai No.3 Middle School, as of July 18, 2023, food processing, environmental protection and other majors were offered in the spring examination class of Jinghai No.3 Middle School. The full name of Jinghai No.3 Middle School is Tianjin Jinghai District Adult Vocational Education Center, which is located in the south of the intersection of Row 4 of Dongsheng Beili and Di Wei Road in Jinghai District, Tianjin.