Min Tzu-chien had lost his mother at a young age. His father remarried and had two more sons with his second wife. She always dressed her own sons in thickly padded robes. But to her stepson she gave only a thin coat. One winter day, when Min Tzu-chien was told to hold the reins of his father's cart, but he was shivering so badly that he dropped the reins.

This was the way his father found out that his wife was dressed his oldest son very poorly. In his rage he decided to dismiss his second wife.
Filial piety yes or no and why?

In this scenario, Min Tzu-chien's father, upon discovering that his second wife had been treating his oldest son poorly, decided to dismiss her. This action can be seen as an expression of filial piety, as Min Tzu-chien's father prioritizes the well-being and fair treatment of his son over his marital relationship. Filial piety is a virtue that emphasizes respect, care, and loyalty towards one's parents or elders, and in this case, the father's decision aligns with the value of filial piety by protecting the interests and welfare of his child.