Who can tell me the difference between hanging and hanging?

Hanging the needle vertically means that the pen is heavy and light, and the vertical writing is big, small and sharp. The "dewdrop" vertical pen is the "dewdrop" on the back of the pen, which is similar in size when writing.

Brief introduction of vertical needle:

Hanging needle is one of the nouns called vertical painting in calligraphy. Where the front is painted vertically, the front is like a hanging needle, so it is called "hanging needle".

Introduction to vertical suspension:

In calligraphy, a kind of vertical writing, with a pen back "dew" (like falling dew), becomes vertical.