龙腾虎跃 Dragon Soaring and Tiger Leaping
Explanation
形容跑跳时动作矫健有力，也比喻奋起行动，有所作为。
Describes movement that is powerful and dynamic, like a dragon soaring and a tiger leaping forward. It can also be used as a metaphor for determined action and achievements.
Origin Story
话说唐朝时期，有一个名叫李白的诗人，他天资聪颖，才华横溢，尤其擅长写诗。一日，他与朋友们相约去郊外游玩，途中经过一片开阔的田野。李白看到远处一群孩童正在田野里玩耍，他们个个精力充沛，龙腾虎跃，欢声笑语，充满了活力。李白被他们天真无邪的快乐感染了，于是提笔写下了著名的诗篇《早发白帝城》：
In the Tang Dynasty, there was a poet named Li Bai who was known for his sharp mind and immense talent, especially for his poetry. One day, he set out with his friends for an outing in nature and passed a vast field along the way. On the edge of the field, Li Bai saw a group of children playing. Each of them was full of energy and easily skipped across the fields, their joyful voices echoing through the air. The children’s carefree joy deeply impressed Li Bai, so he spontaneously picked up his pen and wrote his famous poem "Early Departure from Bai Di":
Usage
形容人精力充沛，精神抖擞，也比喻事物充满活力，发展势头迅猛。
Describes a person who is full of energy and vigor, or something that is vibrant and developing rapidly.
Examples
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他精力充沛，做事总是龙腾虎跃，充满了活力。
tā jīng lì chōng pèi, zuò shì zǒng shì lóng téng hǔ yuè, chōng mǎn le huó lì.
He is full of energy and always does things with vigor.
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看到新的发展机遇，他们都感到龙腾虎跃，充满了希望。
kàn dào xīn de fā zhǎn jī hùi, tā men dōu gǎn dào lóng téng hǔ yuè, chōng mǎn le xī wàng.
Seeing the new development opportunities, they all felt energetic and full of hope.