join-chinese.el

(defadvice org-html-paragraph (before fsh-org-html-paragraph-advice
                                      (paragraph contents info) activate)
  "Join consecutive Chinese lines into a single long line without
unwanted space when exporting org-mode to html."
  (let ((fixed-contents)
        (orig-contents (ad-get-arg 1))
        (reg-han "[[:multibyte:]]"))
    (setq fixed-contents (replace-regexp-in-string
                          (concat "\\(" reg-han "\\) *\n *\\(" reg-han "\\)")
                          "\\1\\2" orig-contents))
    (ad-set-arg 1 fixed-contents)
    ))

test.org

this is a sentence

你好， 我是 某某

Hello, I’m, 某某

他说： “很高兴见到你”