<Tr> <Td> <Ul> <Li> China </Li> <Li> PRC constitution </Li> <Li> Beijing </Li> <Li> Shanghai </Li> </Ul> </Td> </Tr> <Ul> <Li> China </Li> <Li> PRC constitution </Li> <Li> Beijing </Li> <Li> Shanghai </Li> </Ul> <Tr> <Th> Generations of leadership </Th> </Tr> <Tr> <Td> <Ul> <Li> 1 . Mao </Li> <Li> 2 . Deng </Li> <Li> 3 . Jiang </Li> <Li> 4 . Hu </Li> <Li> 5 . Xi </Li> </Ul> </Td> </Tr>

Where did the gang of four try to seize power in 1976