<P> During the Warring states period Ban Liang coins from the State of Qin generally had 8 gram Ban Liang coins from between 32 and 34 millimeters in diameter, while during the Qin dynasty all Ban Liang coins generally had a weight of 6 grams and were about 31.7 millimeters in diameters . Han dynasty era Ban Liang coins are generally smaller than Qin Ban Liang coins, this is due to the Han dynasty government constantly changing weight standards for the coins many variants from that era exist . </P> <P> Western Han dynasty variants include: </P> <Table> <Tr> <Th> Type </Th> <Th> Weight (in grams) </Th> <Th> Diameter (in millimeters) </Th> <Th> Metal </Th> <Th> Emperor </Th> </Tr> <Tr> <Td> 8 Zhu Ban Liang (八 銖 半 兩) </Td> <Td> 4.8 - 5.3 </Td> <Td> 26 - 30 </Td> <Td> Bronze </Td> <Td> Empress Lü </Td> </Tr> <Tr> <Td> 5 Part Ban Liang (五 分 半 兩) </Td> <Td> 1.5 </Td> <Td> 20 </Td> <Td> Bronze </Td> <Td> Empress Lü </Td> </Tr> <Tr> <Td> Snake eye Ban Liang (蛇目 半 兩) </Td> <Td> 2.7 </Td> <Td> 23.4 </Td> <Td> Bronze </Td> <Td> Empress Lü </Td> </Tr> <Tr> <Td> 4 Zhu Ban Liang (四 銖 半 兩) </Td> <Td> ≤ 3 </Td> <Td> 23 - 25 </Td> <Td> Bronze </Td> <Td> Emperor Wen </Td> </Tr> <Tr> <Td> 4 Zhu Ban Liang (四 銖 半 兩) </Td> <Td> 3.5 </Td> <Td> 23.5 </Td> <Td> Lead </Td> <Td> Emperor Wen </Td> </Tr> </Table> <Tr> <Th> Type </Th> <Th> Weight (in grams) </Th> <Th> Diameter (in millimeters) </Th> <Th> Metal </Th> <Th> Emperor </Th> </Tr>

Who standardized the written script coinage and axle width in china