How to change the markdown parser for hexo blog?

before the hexo blog, the third-level title-sharp-sharp-sharp does not need to add spaces, now re-installed after the hexo,-sharp-sharp-sharp must add a space to display, and enter display can not come out, because there are many articles, do not want to change one by one, how to change the markdown parser to solve these problems?

Mar.18,2021
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