<Tr> <Td> Wang Dan </Td> <Td> Beijing; Peking University </Td> </Tr> <Tr> <Td> Feng Congde </Td> <Td> Sichuan; Peking University </Td> </Tr> <Tr> <Td> Shen Tong </Td> <Td> Beijing; Peking University </Td> </Tr> <Tr> <Td> Wang Youcai </Td> <Td> Zhejiang; Peking University </Td> </Tr>

What was the reason for the tiananmen square protest