Hello, the space city in Haidian District, Beijing is about 30 kilometers away from Tiananmen Square. You can take Youyi Road-Beiqing Road from Aerospace City, then take Jingxin Expressway, take the North Fifth Ring Road on Jianting Bridge, then take the Beijing-Tibet Expressway on Shangqing Bridge, finally take the Gulou West Street on Deshengmen Bridge, then take Di 'anmenwai Street-Jingshan West Street-Jingshan Front Street-Beichi Street-Wang Hongbin Street-East Chang 'an Street, and finally reach Tiananmen Square.