There are many English brands, big and small, famous and unknown, but you must do more research and choose one with strong comprehensive strength that suits you best. After all, training is not a day or two. I have been paying attention to the training industry. Recently, a brand called Moer International English seems to be good. A state-owned enterprise and a publishing group publish their own textbooks and books. Textbooks are definitely not a big problem. Other online support seems to be well written. I suggest you know the specific situation, I hope it will help you, hehe!