1. E-mail inquiry: clearly write down the description items of the patent and the contents to be inquired, and send them to the acceptance office of China National Intellectual Property Administration Patent Office.
2. Face-to-face consultation: Go directly to China National Intellectual Property Administration Patent Office for face-to-face consultation.
3. The patent number refers to the number given when the patent right is granted, which is a submission number. The submission number is the serial number compiled by each industrial property office when publishing patent documents (including public publication and reading and copying only). The patent number consists of 12 Arabic numerals and the Chinese pinyin initials "zl" preceded by the word "patent", including the application year number, application category number and application serial number.