The old gentleman who taught Tai Ji Chuan in Tiantan Park asked you for help.

Very simple, just swing your fist round, as long as you have a certain foundation, you can compete with it, even if it is not long. As long as you can make him feel that you can let him teach, you won't let him waste his time. I believe that as long as the old man's personality is the same as what you described, he will teach you. If you learn well, you may learn real kung fu! However, I quite agree with the views upstairs. You really need to go with fate. If you are knocked over by him as soon as you go up, it will be boring. I'm going to see the old man in Beijing during the winter vacation. Call me if you are interested!