The banner of the <a href="https://en.wikipedia.org/wiki/Wuchang_uprising" class="extiw" title="en:Wuchang uprising">Wuchang uprising</a> (<a href="https://zh.wikipedia.org/wiki/%E6%AD%A6%E6%98%8C%E8%B5%B7%E4%B9%89" class="extiw" title="zh:武昌起义">zh:武昌起义</a>) of October 10, 1911, subsequently used as the flag of the army of the Republic of China, ca. 1913-1928.  It appears on many varieties of Chinese currency issued during the 1910's and 1920's.
<div style="display:inline-block;padding:0 3px;background-color:#CCF">Original:</div> <div style="display:inline-block;padding:3px 0;"><a href="https://en.wikipedia.org/wiki/zh:%E6%B9%96%E5%8C%97%E8%BB%8D%E6%94%BF%E5%BA%9C" class="extiw" title="w:zh:湖北軍政府">湖北軍政府</a></div> <div style="display:inline-block;padding:0 3px;background-color:#CCF">Vector: </div> <div style="display:inline-block;"><a href="//commons.wikimedia.org/wiki/User:AnonMoos" title="User:AnonMoos">AnonMoos</a></div>
2007
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Republic_of_China_Flags.jpg" title="File:Republic of China Flags.jpg">Republic of China Flags.jpg</a>  and <a href="//commons.wikimedia.org/wiki/File:WuchangUprising.jpg" title="File:WuchangUprising.jpg">WuchangUprising.jpg</a>