<Li> Da Shu tong bao (Great Shu currency) (Chinese: 大 蜀 通 寶; pinyin: dà shǔ tōng bǎo) are attributed to Meng Zhixiang when he became Emperor Gao Zu of Shu in Chengdu in 934 . He died three months later . Despite its rarity, some say this coin continued to be cast by his son, Meng Chang, until 937 . </Li> <Li> Guang Zheng tong bao (Chinese: 廣 政通 寶; pinyin: guǎng zhèngtōng bǎo) are made of bronze and iron . The bronze coins were cast by Meng Chang from the beginning of this period, 938 . In 956, iron coins began to be cast to cover additional military expenses . They circulated until 963 . </Li> <P> Emperor Yuan Zong (Li Jing) (943--61): </P> <Ul> <Li> Bao Da yuan bao (Chinese: 保 大 元寶; pinyin: bǎo dà yuán bǎo) has on the reverse the character tian above . They are made of iron and date between 943--57 . There is also an extremely rare bronze example of this coin . </Li> <Li> Yong Tong Quan Huo (Chinese: 永 通 泉 貨; pinyin: yǒng tōng quán huò) were produced after 959 . Li Jing was short of funds for his army at that time . His minister Zhong Mo obtained permission to cast large coins, one equal to ten, with this inscription . In 964, the coin was withdrawn when Zhong Mo incurred the displeasure of the Emperor . </Li> <Li> Tang Guo tong bao (Chinese: 唐國通 寶; pinyin: tang guó tōng bǎo) are written in seal, li, and regular script . They date from 959 . </Li> <Li> Da Tang tong bao (Chinese: 大 唐通寶; pinyin: dà táng tōng bǎo) are written in li script and date from 959 . </Li> </Ul>

Han coins and jewelry were usually made of what metal