长闲长庄单跳都是赢简介：With the capital as the core, Tongzhou, Sanhe and Xianghe as the arms, and Tianjin as the flying wings, the defense of these four places was strengthened to block the Jianlu in the Gyeonggi area. This is the second line of defense.
With the capital as the core, Tongzhou, Sanhe and Xianghe as the arms, and Tianjin as the flying wings, the defense of these four places was strengthened to block the Jianlu in the Gyeonggi area. This is the second line of defense.
