Weifeng,
I am pleased to have met you at Wuyi square on Saturday. I agree with you that we need to learn English well as it is the mostly used international language. To learn it well is indeed not easy as you said. However I believe learning English should not be a process only in textbook. Perhaps it is helpful to lean a little bit about the cultural background of English speaking countries, such as USA and the UK. To learn English well we also need to learn the humourous ways in the western communication, especially the gesture expresions.
I hope you would enjoy your learning and make a good progress.
with kind regard!
Lin Wang