According to Article 24 of the Patent Law: "An invention-creation applying for a patent shall not lose its novelty in any of the following circumstances within six months before the date of filing: (1) It was exhibited for the first time at an international exhibition sponsored or recognized by the China Municipal Government; (2) It was first published at a specific academic conference or technical conference; (3) Others disclose the contents without the consent of the applicant. " It can be seen that the three items of ACD meet the meaning of the question.