The signature can be written at the bottom of the last line of the text, leaving room for layout. Generally, the bottom of a paragraph is not flush with the text to avoid the rigidity of the form.
When creating, we should pay attention to the primary and secondary relationship between words and inscriptions. Words are generally smaller than words and should be natural and vivid. You can also occupy one or two lines behind the text, and neither the top nor the bottom can be flush with the text. The seal is smaller than the letter, so you need to leave one more word.