raise one 's arm in a call for action
It's a Chinese idiom. Pinyin is R ǎ NGB ì y ī h ū, which means to shout with one's arms. It comes from the book of answering Su Wu.
Idiom explanation
Hustle and wave. Wave your arms and shout.
Idiom usage
It's not natural that a loud call can be made to all the people, to gather thousands of people, to kill and plunder the officials and people, to ignore their death, to annoy the soldiers and to cut them off. Song xinqiji's Chunxi Jihai on thieves
The origin of Idioms
In Han Dynasty, Li Ling's answer to Su Wu Shu: "ranling raised his arm, and all the diseases began."
Chinese PinYin : rǎng bì yī hū
raise one 's arm in a call for action