1. New Oriental Education Technology Group: New Oriental is one of the largest private education service providers in China and one of the earliest enterprises in China to enter the English training industry. Their early English classes are characterized by small classes and personalized teaching, which is suitable for children of different ages.

2. EF Education: EF Education is the world's leading language training institution, offering multilingual courses. Their early English classes focus on cultivating children's language ability and self-confidence, and adopt interactive teaching methods to let children learn English in a relaxed and pleasant atmosphere.

3. Midland English: Midland English is a professional English training institution with many years of teaching experience and excellent teachers. Their early English classes focused on cultivating children's listening, speaking, reading and writing skills, and adopted multimedia teaching methods to let children better master English knowledge.

4. Reith Subject English: Reith Subject English is an institution that focuses on children's English education and is committed to cultivating children's comprehensive quality and international vision. Their early English classes focus on cultivating children's English thinking ability and creativity, and adopt situational teaching method to let children learn English in actual scenes.