I have just completed watching the third episode.
Thank you, Jack, for drawing my attention to this.
I have learned much.
A couple of things stand out.
The people painting characters using water. That is interesting.
I once, many years ago, saw a pavement artist produce a large picture.
It was in Stratford-upon-Avon.
This was in an area where the public had access but there was a notice on a wall something like "This route is not dedicated to the public."
I don't know the details but it was then a new development.
It seemed that where there were two roads of shops at right angles to each other, with perhaps back yards behind them, two of the shops had been converted to walk through routes, one on each road, and they both led to a large open paved area around which there were lots of small shops. I don't know if the walk ways into the area were open to the sky but perhaps not, perhaps just the ground floor of a not very wide shop having its front window and door removed and the back wall opened so as to provide a tunnel.
Perhaps I can find out from Google street view.
The large central area was open to the sky and covered with what were just basic plain paving slabs.
So it was not public pavement.
I don't know by what authority (if any) the pavement artist was there.
Another thing in the programme was that for Chinese chracters there are books that give the order (and the directions?) of the strokes.
It would be interesting to know the order of the strokes and their direction when people write Latin letters.
For example, is a letter o written clockwise or counterclockwise? Does it vary from person to person? Does each person always write a letter o in the same direction? Is a capital O written in the same direction as a lowercase o?
What about a lowercase letter d? Which order of strokes, which directions?
William