《周书·列传·卷十七》
若干惠二十岁时，跟随尔朱荣征伐，平定河北，击败元颢，因功被拜为中坚将军。
惠年弱冠，从尔朱荣征伐，定河北，破元颢，以功拜中坚将军。
When Ruogan Hui was twenty years old, he followed Erzhu Rong to conquer Hebei, defeating Yuan Hao. For his contributions, he was appointed General of the Central Guard.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 惠年弱冠，从尔朱荣征伐，定河北，破元颢，以功拜中坚将军。 [/INST] When Ruogan Hui was twenty years old, he followed Erzhu Rong to conquer Hebei, defeating Yuan Hao. For his contributions, he was appointed General of the Central Guard.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 惠年弱冠，从尔朱荣征伐，定河北，破元颢，以功拜中坚将军。
user
When Ruogan Hui was twenty years old, he followed Erzhu Rong to conquer Hebei, defeating Yuan Hao. For his contributions, he was appointed General of the Central Guard.
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