Coin history - The Northern and Southern dynasties A.D. 907-960

All dynasties of this period minted coins. The Qi only cast an unknown amount of Wu Zhus, and they are indistinguishable from earlier types. (Peng p. 189).
Peng mentions a man called Gu Xuan of the Liang dynasty that was one of the very first to write about Chinese numismatics. He wrote about the coins of the period, but did not mention any Qi coins. Peng takes this as evidence that the Qi did not mint coins (p. 190).

The Southern Dynasties had much private minting, whereas private minting was more under control during the Northern Dynasties (p.192). This is the reason that coins of the Southern Dynasties were more uneven than those of the Northern Dynasties.

The coins of the Northern and Southern dynasties were of a high artistic standard, especially those of the Chen and the Zhou. All the coins of the period had the same construction: the same kind of seal script calligraphy and narrow rims (p. 194). 

Ever since the Qin Ban Liang, coins had been named after their ideal weight. In this period coins began to have other names like the Wu Xing Da Bu (Large Coin of the Five Elements) or the Yong Tong Wan Guo (Everlasting Currency of the Empire). From the Tang all coin legends were reign titles, but the very first coin with a reign title in the legend came during the Jin, namely the Han Xing, the second was the Yong An Wu Zhu that came during the Northern and Southern dynasties.