C1688 Tightened 4(2)

Qin Shiyu's eyes dimmed a little, but she still said firmly:

"It's also possible, but Bei'an is the only gap. The second line of defense has almost all been taken by the Northern Kingdom. Canglin came too quickly and too suddenly, so we could barely react. Bei'an was the easternmost city on the second line of defense. Its existence could connect the first and third lines, so it had to be..