Video of Liu Chengde in Italy in 2011
The video is in Italian and Chinese. But you can see what's going on from the demonstrations. Enjoy and make your comments if you want to. You can find this video on youtube too. I put it here for students to learn and to comment.
[hdplay file=/videos2011/LiuChengdeInItaly.flv ]
Source: https://practicalmethod.com/?p=16200