<Tr> <Td_colspan="8"> Western Han </Td> </Tr> <Tr> <Td_colspan="8"> Xin dynasty </Td> </Tr> <Tr> <Td_colspan="8"> Eastern Han </Td> </Tr> <Tr> <Td_colspan="8"> Three Kingdoms 220--280 </Td> </Tr>

Summarize the events that led to the establishment of the peoples republic of china