Regret means always missing out, but relief means no longer regretting. Relief means letting go of the shackles and entanglements in the heart, which means letting go of one thing and looking down on one thing. Most of them are due to some reason, which leads to a change in thinking, and suddenly they realize that emotions such as hatred and joy are in their hearts. Regret: regret, pity, regret (used in diplomatic language, etc.)