《汉书·志·地理志上》
覃怀一带的治理取得了成效，就又到横流入黄河的章水。
覃怀底绩，至于衡章。
The management of Tanghuai was effective, so he went to Zhangshui, which flowed into the Yellow River.
<s>[INST] Kindly elucidate the central themes in this passage in English: 覃怀底绩，至于衡章。 [/INST] The management of Tanghuai was effective, so he went to Zhangshui, which flowed into the Yellow River.</s>
Kindly elucidate the central themes in this passage in English: 覃怀底绩，至于衡章。
user
The management of Tanghuai was effective, so he went to Zhangshui, which flowed into the Yellow River.
assistant