Hi:

the function 'org-contacts-get-exist-contact-name-string  will be
used in org-capthure template, for example:

#+begin_example
("c" "Contacts: 手动输入" entry (file "~/org/i-contacts.org")
      "* %(org-contacts-get-exist-contact-name-string %^{prompt})"
#+end_example

Note: This function can't work as expect and I fail to find the solution
at this moment. If someone have good  ideas, please mail me. Thanks!