Excuse me, what does "sincerity" mean and where is it commonly used? Thank you.

Dear is a Chinese word, and the pinyin is "jìng Shang", which means respect, courtesy and etiquette. From "Shi Lihan's Monument to Hou Cheng, the head of Jinxiang": "Being poor and benefiting, the times turn." I want to take it from you. When I look back on my past experiences, I will learn something new. "

In ancient times, honorific words or modest words were used at the end of letters to show respect for the recipients. It is more common in Japanese now.

Sincerity is a very respectful title, which is used when subordinates treat their superiors and juniors treat their elders. It cannot be used by superiors to subordinates and elders to juniors, and it is not recommended to use it at the same level.