It is no problem to pass CET-6 easily and recite some words. The TOEFL score is above 90, provided that you study really well and study the supporting oral teaching materials, reading and writing teaching materials in a down-to-earth manner. Apart from professional English, there is absolutely no problem with life English. I hope you know that there are more than 2,300 words in English, accounting for 87% of spoken English words. That is to say, there are only a few commonly used words in spoken English. These 2000+ words are all below CET-6, but those who want to read foreign language websites basically read English novels unimpeded. Generally speaking, more than 8000+ vocabulary plus at least high school grammar knowledge. New horizons are all learned, 6500+ words. The level is already quite good, provided that you really learn it well.