How to find longevity elixir

In the search for longevity, you can refer to the following for how to find longevity elixir:

In the game "Looking for Longevity", players can buy elixirs that increase longevity (for example: Qingming Pill, longevity 20) from the Foreign Affairs Deacon of Tianji Pavilion. After purchasing and using them, they can increase longevity.