The tide is on and off
As a Chinese idiom, CH á om í ngdi à NCH è is Pinyin, which means extremely powerful and fast. It's from the soul of Sparta.
Analysis of Idioms
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The origin of Idioms
Lu Xun's the soul of Sparta: "I can only see the enemy vanguard in full swing, with three times the momentum, behind the Spartan army."
Idiom usage
It can be used as adverbial, commendatory and quick.
The tide is on and off
due to excellent army discipline , all is peace and quiet - jī quǎn wú jīng
long distance separates no bosom friends - tiān yá bǐ lín