I'm not sure as I haven't read it specifically. But generally, it might be about a secret relationship or some hidden aspects of the characters' lives.
Well, in flash fiction, this phrase might suggest that there are certain boundaries or limitations. It could imply that characters can't hold onto things that aren't rightfully theirs, maybe as a moral lesson or a plot device to create conflict and resolution.
In this word,"this" referred to "this letter". When people wrote letters, they would write " Sincerely Salute " at the end to show their respect and gratitude to the recipient. At the same time, they would also show that they were responsible for the authenticity and accuracy of the letter.
This meant that the letter was a formal and dignified letter that could be used to express gratitude or to formally convey a message. In this context," Sincere Salute " was usually used to express respect and gratitude to the recipient.
This referred to 'this letter'. In Chinese letters,"this" was a common auxiliary word used to end a sentence to express the main idea and content of the letter. In this letter, I convey my thoughts and blessings, hoping to help you through this difficult time.
At the end of the letter, he wrote," With utmost respect." The " here " referred to the " letter ", which was the content of the letter. In English,"this" was usually used to mean "this" or "such" to indicate that this was the content of the letter or part of it. In Chinese letters,"this" could also mean "this letter", but it was usually followed by "salute" to express a more formal and polite tone.
This meant that the letter was genuine and had no additional information. In addition, this salutation could also be understood as expressing gratitude and saluting letters that usually appeared in formal occasions.