There is a song that fights and bites, perseveres and bites.

Pinyin: × ai d ?ㄉˇ Meaning: 1. Be beaten. 2. Others make themselves uncomfortable, and hit them with instruments such as belts or wooden sticks.

Perseverance, also called willpower, is a kind of will quality that people consciously overcome difficulties and strive to achieve in order to achieve predetermined goals; Perseverance is a kind of "psychological endurance" of people, and it is the "endurance" of a person to complete his study, work and career.