Article 33 of the Patent Law clearly stipulates that the amendment shall not go beyond the scope recorded in the original application documents. If everyone can improve or improve the scheme through modification in the later stage, then the examination of a patent from application to authorization is likely to be endless, and there may be no patents that cannot be authorized, but they can be improved at will.
If there is a better design scheme, at least two schemes can be adopted: 1 and resubmitting the patent application. 2. You need to resubmit the patent application. However, if the filing date of the first patent application does not exceed 12 months, the priority of the first patent can be claimed. In this case, the patent submitted first will be considered as withdrawn, and the same part of the patent submitted later will enjoy priority.