The modification shall not exceed the scope recorded in the original specification and claims, that is, the modified application documents shall not be modified by adding, deleting or replacing, resulting in the increase of contents that are not recorded in the original specification and claims and cannot be directly deduced from them.
The scope recorded in the original specification and claims refers to the contents expressed in the specification (including drawings) and claims submitted on the filing date, as well as the contents directly deduced by the technicians in this field from the contents expressed in the specification and claims.
Therefore, it doesn't matter if you add pages that are not beyond the scope separately from your instructions and drawings. However, you can't add a new technical scheme to the original technical scheme, which is beyond the scope.