Then give a rebuttal example. For example, which commonly used materials have very poor effects. It is best to directly record these relatively poor effects in published papers or other documents. If there is no such thing, specify in the statement of opinion that the inventor has done the experiment and list it in detail. The experimental data proves that the effect of choosing other common materials is really bad compared with the present invention. The prerequisite for adding a description of experimental data in the statement of opinion is that the experimental methods and the effects of the present invention must be originally recorded in the description. What is added to the statement of opinion is only the relevant data of comparative examples. Otherwise, the examiner will not approve it.