2, the first trial does not review novelty, only review the form and other issues, generally will pass.
3. There are many issues that need to be examined in the substantive examination. In addition to novelty, creativity and practicality, it is also necessary to examine whether it is open and sufficient, whether the claims are clear and so on.
4. After the patent is made public, it will not be revoked by the National Information Bureau, and it has been in the public state. However, the applicant can withdraw the patent, and the withdrawal of the patent will not affect the public status of the patent, but only means that the applicant has given up the right to obtain the patent.