of Yunnan issued a Chinese dragon dollar coin that is commonly known as the "Yunnan Spring dollar", the coin was issued after the government of the Qing dynasty had enacted the "Currency Regulations" () on 15 April 1910. The Yunnanese government had quickly taken the coin dies that they had been using to make the silver coins they issued in 1909 and would then engrave these new coins with an additional inscription at the top stating "Made in the Yunnan Province in the spring of the year Gengxu (1910)" ().This the only coin in the numismatic history of China that features a season of the year as part of the date. This was done because according to the traditional Chinese calendar that was in use at the time, the "spring" was a time that referred to the first 3 months of the year, January, February, and March. The centre of the obverse of the Yunnan Spring dollar contains the inscription "Xuantong Yuanbao" (宣統元寶), while on the bottom it contains the denomination of the coin as "Kuping Qi Qian Er Fen" (, "Treasury Standard 7 Mace and 2 Candareens"). The reverse side of the coin features prominent dragon. The Yunnan mint deliberately wrote down that the coin was issued in "the spring of 1910", because the new regulations set by the imperial government wouldn't take effect until April 1910. However, the imperial Chinese government soon discovered the scheme at the Yunnan mint and quickly ordered that all these of these new "spring dollar" coins were to be withdrawn and later melted down. In 1920 during the early Republican era it was discovered that an extremely small number of these coins had escaped being destroyed and these surviving specimens that are now known are commonly referred to as the "Yunnan Spring dollars" by Chinese numismatists and coin collectors. Only two genuine specimens are known to exist making it among the very rarest of China's coins. In April of the year 2002 the first genuine "Yunnan Spring dollar" to appear at public auction was sold in Beijing, at the Hua Chen auction. In 2007 the same "Yunnan Spring dollar" as above was re-sold in a Cheng Xuan sale in Beijing where the coin was sold for ¥3,192,000 ($468,000). In August of the year 2010 the same "Yunnan Spring dollar" as above was sold at a Hong Kong auction by Michael Chou, of Champion