From what grade did Yangxi Best Foreign Language School start teaching English?

Kindergarten. According to Sohu official website, Yangxi Best Foreign Language School has been implementing bilingual teaching since kindergarten, with 30 students in each class. Best Foreign Language Primary School, founded by educators in Taiwan Province Province, is a one-stop education system consisting of training centers, kindergartens, primary schools, junior high schools, senior high schools and foreign cooperative schools.