Please, in note A, there are multiple paragraphs for block quoting. How can I quickly refer to these marked paragraphs of note A in note B?

For example, in note A, there are several paragraphs that have been block quoted and put into note C. [[note A#^fdasfa]] [[note A#^vxczv]] [[note A#^ewqr]]
Now these paragraphs of note A need to be referenced in note B, but if you type [[note A#^ , the full text of note A will appear, and since the characters after #^ are random, you can only find them by looking at them paragraph by paragraph before not looking at notes A and C.
Is there a quick way to find paragraphs where note A has been block referenced, or is it possible to customize the block references with random characters, e.g. customizing all block references could be ^ffxxxx, ff being the custom character and xxx being a random character?

You can write custom block IDs before referencing the block. Thus, if you are in note A, you can add, for example, ^ffxxxx or, also possible, something like ^any-keywords to all the blocks you know you want to link to later on from other notes.

Then, you can find these blocks by typing [[note A^ff and the results shown will be limited to the respective blocks.

To add as a reference …

Angel

Thanks for your reply, I do write block IDs now, but sometimes I get lazy and use the obsidian42 plugin to copy the block IDs of paragraphs directly, and the block IDs are a paragraph of random characters. After time, a note will have custom block IDs and block IDs of random characters, so some paragraphs will need to be looked up in full.