2. The scope of patent protection is the widest (independent claim), and the right to write does not mean that the scope is only as big as the right;
3. The purpose of this writing is not to prevent the scope of the exclusive right from being too wide, but to prevent the exclusive right from being rejected due to the too wide scope of protection during the application process (the examiner finds the contrast documents that affect novelty and creativity). At this time, when replying to the review opinions, the subordinate rights (small in scope, more specific in scheme, and difficult to refute) can be raised to exclusive rights. The audit process is a bargaining process. It's always good to prepare more chips. The more important reason is that if it is invalid, you can only change the claim in a very limited way. If you don't follow right, you will be passive.
4. If the exclusive right is too wide, it can only be partially invalid, but subordination is effective, which is one of the reasons why you want to write subordination. If you have no affiliation at this time, your exclusive right is invalid, which is equivalent to the whole invalidity. If there is a subordinate relationship, you can still get a right in a relatively small scope, which is better than nothing, and no one can say that it is useless if the scope is small, sometimes.
5. As mentioned above, the invalidity of claims is analyzed one by one, because the scope (technical scheme) of each claim is different, and the technical features included are also different. Independent claims contain the least features and are most likely to be invalid, while claims contain more features. Therefore, in the face of the same comparative documents, invalid rights are not necessarily invalid.