Very strict. Zheng Tao Education strictly controls teachers' teaching quality in teaching. Teachers are all front-line teachers, with more than 6 years of teaching experience in the industry. Take a zero-tolerance attitude towards teachers who lack sense of responsibility and have poor teaching quality. Educational administration adopts online and offline synchronization, recording and broadcasting the whole process, and can chew it repeatedly. If you can't digest it offline in time, you can answer it online and brush the questions massively until you master it.