Mobile phone number reason. The reason why the local version of the patent search and analysis system cannot receive the verification code is that the mobile phone number is not in good condition, which may be due to the arrears of the mobile phone number. Verification code (CAPTCHA) is the abbreviation of "Completely Automated Public Turing test to tell Computers and Humans Apart" (fully automated Turing test to distinguish computers and humans). It is a public and fully automatic program to distinguish whether the user is a computer or a human.