Tonight I have joined a Tai Chi course provided by private tutors at my estate. The first 2 lessons are free of charge. There are only 3 new students. The tutor taught us the basics, while the old students continued to learn their Tai Chi Fan. We learnt only 5 styles at the first lesson. Nonetheless, I slept better that night. (For "better", I meant I took only 3 kinds of sleeping pills to fall asleep, instead of 5 kinds of sleeping pills) Since it significantly improve my sleeping quality, I think I will keep joining the classes, even though it is quite expensive.