"Foster father Zhao Ruide celebrated his 200th birthday last year; he has already reached the sixth grade in the Inspection Bureau."
"Foster mother Mrs. Cai, at 171 years old, has also had several longevity extensions."
Minor longevity extensions have happened quite a few times.
For example, Zhao Zheng, who is now a fifth-grade military officer, Mrs. Cai was granted the title 'Lady Wu Hua' due to this reason, which is the seventh rank in the Imperial Mandate hierarchy.
No actual military power or authority, just honor and longevity extension.
My second sister Zhao Yuhuan is now a fifth-grade Preaching Master.
Third sister Zhao Yuling is a fifth-grade Weaver.
They haven't accomplished any particular feats but have brought slight longevity extensions to Zhao Ruide and Mrs. Cai.
There is mainly one major longevity extension.
It was given during Emperor Jing's 900th birthday, when rewarding ministers, he mentioned Zhao Ruide and Mrs. Cai's great love.
