Yu: Now I don't recite words every day. Since I stopped teaching in 2000, my vocabulary has been declining, reaching about 30 thousand to 40 thousand at the highest time. Now I estimate it to be between 15 thousand and 20 thousand. I will remember the common words I read in the daily newspaper, and I will remember the words in the books I teach. The size of my vocabulary has nothing to do with my English level. For anyone who wants to learn English, memorizing words is enough. Now I try to immerse myself in the English world for half an hour every day, whether it is movies, magazines or books, so as to keep my English level, because New Oriental is an English school after all, and its English level is too low for others to look down upon.
See http://www.neooriental.org/news/teacher/200404/1130687.html for details.