First, if commas are still needed, quotation marks are not needed. For example, Huo Ran told reporters that Mr. Jiang felt that his main business was crosstalk, and calligraphy was just a hobby, so he mostly gave words to others, and selling words was only a special case.
2-1, if you insist on using quotation marks here, then change the comma into a colon and put the period in front, because the sentence in your quotation marks is paraphrasing the original words of others, so you need to keep the period. For example, Huo Ran told reporters: "Teacher Jiang thinks that his main business is cross talk, and calligraphy is just a hobby, so most of them give words to others, and selling words is only a special case."
2 -2. If you only reprint a short paragraph or a few words from others, delete the colon and add a period at the end of the whole sentence. Huo Ran told reporters that "Teacher Jiang thinks his main business is cross talk".
I hope I can solve your problem. My name is Happy. Thank you!