“…Home languages are listed alphabetically according to the number of languages identified. Different mother tongues may be used to indicate different and even opposite cultural backgrounds, political stands, values, and moral standards (Niu, 2016). The age brackets of the students are divided into six categories (<21, =21, =22, =23, =24 and >24 years of age) not less than a third of the maximum student number should exist for any age bracket.…”