1. When adding a seal, there should be no text at the top and year and month at the bottom. 2. When two seals are affixed, and when two seals are required for joint writing, the written date should be spread apart, leaving 7 characters blank on the left and right; the seal of the sponsoring agency should be in front; both seals should be equal to the written date, and the seal should be red. Only the same sealing method can be used to ensure that the seals are arranged neatly. The two seals do not intersect or are tangent to each other, and the distance between them does not exceed 3MM.

3. When the joint document requires more than three seals, in order to prevent blank seals