对牛弹琴:
Meaning: Talking to someone who doesn't understand or appreciate what's being said.
Explanation: Literally "playing the lute to a cow," it emphasises the futility of explaining sophisticated matters to someone incapable of understanding them.

胆小如鼠 :
Meaning: Extremely cowardly or fearful.
Explanation: Likening someone's fearfulness to that of a mouse, this idiom highlights timidity and lack of courage.

龙飞凤舞:
Meaning: Dynamic and lively, often describing energetic calligraphy.
Explanation: This idiom paints a picture of a dragon flying and a phoenix dancing, symbolising movement and vitality, especially in artistic expression.

劳燕分飞:
Meaning: A couple or close friends parting ways.
Explanation: This idiom likens the separation of two close individuals to the migratory swallows that fly apart, indicating sorrowful departure.

凤毛麟角:
Meaning: Extremely rare and precious.
Explanation: Refers to the mythical phoenix's feathers and the unicorn's horns, both considered rare and valuable. Used to describe something or someone very unique.

东山再起:
Meaning: Make a comeback after a period of decline or failure.
Explanation: This idiom comes from the story of Xie An, who, after retreating to Dongshan (Eastern Mountain), returned to prominence. It signifies resilience and resurgence.

草船借箭:
Meaning: To use the enemy's resources against them.
Explanation: Originating from the Three Kingdoms period, this idiom tells the story of Zhuge Liang using straw boats to collect arrows from the enemy, demonstrating clever strategy and resourcefulness.

马到成功:
Meaning: Achieve instant success upon starting a task.
Explanation: This idiom is often used to wish someone good luck and immediate success in their endeavours, much like the swift and victorious arrival of horses.

高山流水 - This idiom translates to "tall mountains and flowing water" and is often used to describe a deep and lasting friendship or an inseparable bond between individuals.