  The instrument is to be made by a luthier individually, from start to finish,
   without assistants.

   And except for using machines to saw large pieces of tonewood into smaller
   pieces, no other machines are used.

   Please also watch the video below, to cut for thinning, by hand
   https://chineseviolins.net/instruments-zh/making.html

   If you want a handmade instrument, make sure your supplier sells you:
   All handmade, individually made.
   If it is just a handmade instrument, it could be
   Hand varnish
   Hand sand
   Several processing workers, each does a part of the product line, and then
   put them together.

   And also to make sure that the thickness distribution of the top and back
   plates are different from that of the Master 300 years ago.

   If you ask your supplier and they tell you that they are definitely the
   same, then they must be made by machines, on product lines, and do not know
   how to make instruments.

   If you want a good professional instrument, it must be custom made, not
   selected.

   If your supplier tells you that the instruments we show you are carefully
   selected, then they must be a "professional instrument" selected by a professional
   player from the 3,000 instruments mass products each month. Such a instrument
   will get worse and worse as you play it, because you will think the sound
   is good at the beginning, because the top and back plates are very thin
   and vibrate well, but it will gradually get worse and worse until it becomes
   a defective product.

   ......