《资治通鉴·唐纪·唐纪六十六》
十二月，戊申，安南本地人勾结南诏王国军队共合三万人乘虚进攻交趾，将交趾城攻陷。
十二月，戊申，安南土蛮引南诏兵合三万馀人乘虚攻交趾，陷之。
In December, Wu Shen, the natives of Annan, colluded with the army of the Nanzhao Kingdom, and a total of 30,000 troops took advantage of the situation to attack Jiaozhi and capture Jiaozhi City.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 十二月，戊申，安南土蛮引南诏兵合三万馀人乘虚攻交趾，陷之。 [/INST] In December, Wu Shen, the natives of Annan, colluded with the army of the Nanzhao Kingdom, and a total of 30,000 troops took advantage of the situation to attack Jiaozhi and capture Jiaozhi City.</s>
Explain the meaning of this Classical Chinese passage in English: 十二月，戊申，安南土蛮引南诏兵合三万馀人乘虚攻交趾，陷之。
user
In December, Wu Shen, the natives of Annan, colluded with the army of the Nanzhao Kingdom, and a total of 30,000 troops took advantage of the situation to attack Jiaozhi and capture Jiaozhi City.
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