This time, it was Wang Shida's turn to greet Wang Shouzhe first: "Shida pays respects to Great Uncle Shouzhe."
In terms of actual age, Wang Shida was indeed thirty to forty years older than Shouzhe and his cultivation base had reached the Mid Stage of the Heavenly Human Realm. However, Shouzhe held a higher generational rank.
Nobody in the "Shi" generational rank, regardless of actual age, should call those in the "Shou" rank anything other than 'grandfather'.
Typically, one would address the other clearly by which 'Grandfather' they are, but in cases of being of the same clan but different families, and when it's not clear what the exact seniority is, terms like "Grandfather Shouzhe" are also correct.
"Shida, don't be so courteous; you're much older than Shouzhe. Just call me Shouzhe," Wang Shouzhe hurriedly helped him up, saying.
"Great Uncle, please do not humble Shida so," Wang Shida, startled, paled considerably, quickly standing straight to decline politely.
