C569 Hostages' threat

Liu Ye said: "Jiao Prefecture Fan, is your army preparing to launch an all-out attack?" I nodded. "Yes!" Liu Ye shouted loudly, "The stone-throwing cart is preparing to change its target not to a city, but to their opponent's moat!" After he gave the order, thirty fireballs danced in the sky. When these thirty fireballs accurately landed on the moat, another thirty fireballs appeared in the sky