China, 919-924 AD., the Ten Kingdoms Period, Former Shu state, emperor Wang Yan, Hartill 15.42.

China, the ten kingdoms period (907-960 AD.), Former Shu state, emperor Wang Yan (son of Wang Jian) (919-925 AD.), reign title Qian De (919-924 AD.), issued 919-924 AD.,
1 Cash (23,5 mm / 3,19 g), cast, square center hole,
Obv.: 乾 德 元 宝 , Qian De Yuan Bao (Qian De Yuan Bao), clockwise.
Rev.: plain (square center hole).
Hartill p. 118, no. 15.42 (rarity 12, common) ; Schjöth 433 .

Five Dynasties and Ten Kingdoms (simplified Chinese: 五代十国; traditional Chinese: 五代十國; pinyin: Wǔdài Shíguó) was between 907–960/979 AD and an era of political upheaval in China, between the fall of the Tang Dynasty and the founding of the Song Dynasty. During this period, five dynasties quickly succeeded one another in the north, and more than 12 independent states were established, mainly in the south. However, only ten are traditionally listed, hence the era's name, "Ten Kingdoms." Some historians, such as Bo Yang, count 11, including Yan and Qi, but not Northern Han, viewing it as simply a continuation of Later Han. This era also led to the founding of the Liao Dynasty.
The Later Liang Dynasty (yellow) and contemporary kingdoms

Wang Jian (王建) (847-July 11, 918), courtesy name Guangtu (光圖), formally Emperor Gaozu of (Former) Shu ((前)蜀高祖), was the founding emperor of the Chinese Five Dynasties and Ten Kingdoms Period state Former Shu. He started his career as an army officer under the Tang Dynasty eunuch generals Yang Fuguang and Tian Lingzi, eventually seizing control of the modern Sichuan and Chongqing region, founding his state after Tang's destruction. In early spring 918, Wang Jian changed the name of the state from Han back to Shu.
That year, Wang Jian, who began to see that Wang Zongyan (whose name was changed to just Wang Yan by that point so that his brothers and adoptive brothers would not have a problem observing naming taboo) was not an appropriate crown prince due to Wang Yan's obsession with gaming and feasting, and thus became resentful of Zhang - but with Consort Xu supporting Zhang, he did not remove Zhang from his chancellor post. He did, however, consider replacing Wang Yan with Wang Zongjie. When Wang Zongjie died suddenly, he became very suspicious that the death was the result of foul play, but thereafter took no further action to replace Wang Yan.
Wang Jian became very ill in summer 918, and he summoned a group of high level officials to entrust Wang Yan to them. Tang, however, wanted to eliminate the high level officials so that he could take power by himself. The high level officials realized this, and they forced their way into the palace to inform Wang Jian. Wang Jian thus exiled Tang, while issuing a final edict in which he put the eunuch Song Guangsi (宋光嗣), as well as Wang Zongbi, Wang Zongyao, Wang Zongwan, and Wang Zongkui (王宗夔) in charge of assisting Wang Yan in his reign. He also left instructions that the family of Consort Xu's family was not to be given military commands. He soon died, and Wang Yan took the throne as emperor.

The Five Dynasties:
Later Liang Dynasty (June 1, 907–923)
Later Tang Dynasty (923–936)
Later Jin Dynasty (936–947)
Later Han Dynasty (947–951 or 979, depending on whether Northern Han is considered part of the dynasty)
Later Zhou Dynasty (951–960)
The Ten Kingdoms: Wu (907-937), Wuyue (907-978), Min (909-945), Chu (907-951), Southern Han (917-971), Former Shu (907-925), Later Shu (934-965), Jingnan (924-963), Southern Tang (937-975), Northern Han (951-979).
Other regimes: Yan, Qi, Zhao, Yiwu Jiedushi, Dingnan Jiedushi, Wuping Jiedushi, Qingyuan Jiedushi, Yin, Ganzhou, Shazhou, Liangzhou.