There are two points to note:
A, the merged application must meet the requirements of oneness, otherwise it is not cost-effective to divide the case again.
B, joint application must also require the priority of the first two applications, otherwise, it will affect the novelty.
2. If a joint application is submitted and the priority of the first two applications is claimed, the first two applications will be considered as withdrawn.
3. If a joint application is submitted and the priority of the first two applications is claimed, the publication of the first two applications will not affect the novelty of the joint application.