What does it mean to win the the glory of the king season championship?

Triple crown refers to winning three championships in a season, that is, triple crown, such as Manchester United triple crown.

Premier League champion, FA Cup champion, Champions League champion. The same is true of the glory of the king. The glory of the king's Triple Crown refers to the team that won three championships in autumn cup, winter cup, summer cup and spring cup in one season, and all the teams that won the championship are KPL events.