What is the ending format of the letter greeting?

Used for grandparents and parents: salutation, honorific title, honorific title, honorific title, honorific title, honorific title and knocking at the door.

Habit of respecting elders: sincerity, earnestness, worship, sincerity, respect and sincerity.

Used for peers: sincerity, sincerity, sincerity, hand, hand, nod, worship, say, worship, pray, say and say.

Younger generation: Shou Yu, punctuality, Lu, Cao, Cao Shi and Yu.

Used to reply: Fu Su, hands, heart, heart.

Used for anonymity: justified (with a business card attached), clear-minded, sealed-hearted, forgiving and knowing both.

Used as a supplement: start again, arrive again, update again, update again, update again.

Postscript:

Greet the elders: in front of your father (or mother), ask a name to pay tribute to an uncle and ask a name to pay tribute to him.

Greeting your partner: one brother prayed for greetings before, and the other brother didn't send another letter to ask for greetings.

Greetings to the younger generation: Wait for my son Jiaji to say hello.

Waiting for elders: Father wants a pen to greet an uncle.

Waiting for peers: my brother wrote a greeting, and one brother wrote a greeting.

Waiting on behalf of the younger generation: children wait for Sun Xiao and pay tribute with a pen.