<Table> People's Republic of China <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> United Nations membership </Th> </Tr> <Tr> <Th> Represented by </Th> <Td> <Ul> <Li> Republic of China (1945--1949) </Li> <Li> Republic of China on Taiwan area (1949--1971) </Li> <Li> People's Republic of China (1971--present) </Li> </Ul> </Td> </Tr> <Tr> <Th> Membership </Th> <Td> Full member </Td> </Tr> <Tr> <Th> Since </Th> <Td> 24 October 1945 (1945 - 10 - 24) </Td> </Tr> <Tr> <Th> UNSC seat </Th> <Td> Permanent </Td> </Tr> <Tr> <Th> Permanent Representative </Th> <Td> Ma Zhaoxu </Td> </Tr> </Table> <Tr> <Th_colspan="2"> United Nations membership </Th> </Tr>

When did china become a member of the security council