Examiners regard a small technical feature as a conventional technical means, which is often not supported by evidence. Conventional technical means are known to the technicians in this field .. Examiners sometimes split the connection between this part of technical features and other technical features, so when defending, they should explain that this part of technical features is related to other features, and can prove the synergistic technical effect after the connection. Furthermore, if it is proved by providing evidence that it is not a conventional technical means, such as providing papers or patents after the filing date, if this part of the features is mentioned, and it may be judged from the content that this part of the features is actually not a conventional technical means, it can be provided as evidence. Good luck.