Is a textbook of thread-bound calligraphy in Qing Dynasty valuable?

There is still some value.

But are you sure it's true?

If this is true,

This is what many calligraphy lovers have always wanted (so have I).

But it's a pity that one copy is missing, which has a certain impact.

You'd better check if there are any missing pages.

These are the keys to its value.