Lonely loyalty is enough to show your sincerity, but after three years, you still need to turn into a game-writing book. What is an idiom?

idiom

Blood of justice and loyal heart-absolute loyalty and superb courage

Pinyin: bixuèdān xρn

Commentary: Full of righteous blood, a sincere heart. Described as very loyal and firm.

Source: "Zhuangzi Foreign Things": "Changhong died in Shu, hiding blood, and turned green in three years."

Synonyms: loyalty, courage and innocence.

Antonym: ulterior motives, ulterior motives and treachery.

Grammar: combination; As predicate and object; Describe a martyr who died for a just cause