During the period of the Republic of China, Chen Fu was named after one person, and Wang Kangping was named after one person. This is from Wang Kangping to Chen Fu, so "My dear friend" needs no explanation, right? "Righteousness" is a polite word of modesty, which probably means teaching.
At present, many calligraphy works are written like this. If you write to someone, you can write "so-and-so". You can see the calligraphy works given to you by others in other people's homes.
Please advise my brother.
Signature: A gift from my brother Wang Kangping.